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Dreamweaver CS5 Essential Training
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Modifying image properties


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Dreamweaver CS5 Essential Training

with James Williamson

Video: Modifying image properties

One of the constant challenges in working with sites built around clean HTML and CSS is precisely what to control with CSS and what to control through the HTML? Working with images is a particularly great area, since there are many properties that you can control, either through CSS or directly through the image itself. In this movie, we are going to discuss the image properties you can change using Dreamweaver's Properties Inspector and the benefits of controlling these properties through the Image tag or through CSS.
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  1. 2m 57s
    1. Welcome
      1m 8s
    2. Using the exercise files
      1m 49s
  2. 7m 50s
    1. What is Dreamweaver?
      3m 16s
    2. Learning web design
      2m 22s
    3. Current web standards
      2m 12s
  3. 43m 9s
    1. The Welcome screen
      4m 5s
    2. Windows and Mac interface differences
      2m 23s
    3. The Application toolbar
      4m 7s
    4. The Document toolbar
      4m 40s
    5. Arranging panels
      8m 19s
    6. Managing workspaces
      7m 32s
    7. The Properties Inspector
      5m 54s
    8. The Insert panel
      6m 9s
  4. 25m 45s
    1. Basic site structure
      3m 11s
    2. File naming conventions
      1m 49s
    3. Defining a new site
      4m 35s
    4. Managing sites
      4m 51s
    5. Managing files and folders
      6m 36s
    6. Working with browsers
      4m 43s
  5. 27m 21s
    1. Creating new documents
      5m 16s
    2. New document preferences
      3m 6s
    3. Setting accessibility preferences
      4m 56s
    4. Working with starter pages
      3m 46s
    5. Managing starter pages
      10m 17s
  6. 30m 2s
    1. Basic tag structure
      2m 15s
    2. Adding structure to text
      8m 20s
    3. Creating lists
      9m 59s
    4. Getting text into Dreamweaver
      5m 59s
    5. Importing Word documents
      3m 29s
  7. 1h 17m
    1. Understanding style sheets
      2m 16s
    2. The anatomy of a CSS rule
      1m 48s
    3. Setting CSS preferences
      6m 36s
    4. The CSS Styles panel
      10m 2s
    5. Controlling CSS through the Properties Inspector
      5m 14s
    6. Using the Code Navigator
      7m 21s
    7. Using CSS Enable
      6m 45s
    8. Understanding element selectors
      8m 11s
    9. Understanding class selectors
      8m 49s
    10. Understanding ID selectors
      5m 59s
    11. Understanding descendant selectors
      6m 51s
    12. Attaching external style sheets
      7m 44s
  8. 1h 47m
    1. Working with units of measurement
      7m 11s
    2. Declaring font families
      9m 39s
    3. Controlling font sizing
      9m 9s
    4. Controlling weight and style
      8m 0s
    5. Controlling line height
      8m 29s
    6. Controlling vertical spacing with margins
      12m 3s
    7. Controlling spacing with padding
      5m 39s
    8. Aligning text
      8m 26s
    9. Transforming text
      5m 36s
    10. Writing global styles
      15m 42s
    11. Writing targeted styles
      17m 37s
  9. 1h 32m
    1. Understanding image types
      5m 3s
    2. Managing assets in Dreamweaver
      12m 51s
    3. Setting image accessibility preferences
      4m 20s
    4. Setting external image editing preferences
      3m 52s
    5. Placing images on the page
      7m 37s
    6. Photoshop integration
      5m 54s
    7. Modifying Smart Objects
      5m 51s
    8. Alternate Photoshop workflows
      8m 8s
    9. Modifying image properties
      11m 14s
    10. Styling images with CSS
      7m 11s
    11. Using background graphics
      9m 3s
    12. Positioning background graphics
      11m 6s
  10. 55m 16s
    1. Link basics
      3m 37s
    2. Setting site linking preferences
      2m 14s
    3. Creating links in Dreamweaver
      11m 1s
    4. Absolute links
      5m 8s
    5. Using named anchors
      11m 19s
    6. Linking to named anchors in external files
      2m 44s
    7. Creating an email link
      5m 24s
    8. Creating CSS-based rollovers
      13m 49s
  11. 1h 34m
    1. CSS structuring basics
      2m 56s
    2. The Box Model
      13m 21s
    3. Understanding floats
      6m 53s
    4. Clearing and containing floats
      8m 56s
    5. Using relative positioning
      4m 8s
    6. Using absolute positioning
      7m 18s
    7. Creating structure with div tags
      12m 7s
    8. Styling basic structure
      10m 34s
    9. Creating a two-column layout
      10m 37s
    10. Using Live View and CSS Inspect
      7m 51s
    11. Using Browser Lab
      9m 39s
  12. 56m 22s
    1. Reviewing table structure
      7m 41s
    2. Importing tabular data
      5m 13s
    3. Creating accessible tables
      9m 56s
    4. Using thead and tbody tags
      4m 0s
    5. Basic table styling
      8m 45s
    6. Styling table headers
      7m 52s
    7. Styling column groups
      4m 22s
    8. Creating custom table borders
      5m 1s
    9. Styling table captions
      3m 32s
  13. 1h 43m
    1. How forms work
      3m 0s
    2. Reviewing form design
      3m 2s
    3. Creating accessible forms
      7m 33s
    4. Setting form properties
      4m 6s
    5. The fieldset and legend tags
      4m 32s
    6. Inserting text fields
      5m 58s
    7. Inserting list menu items
      5m 26s
    8. Inserting checkboxes
      7m 50s
    9. Inserting radio button groups
      6m 22s
    10. Inserting text areas
      4m 12s
    11. Inserting submit buttons
      3m 37s
    12. Basic form styling
      12m 0s
    13. Form element styling
      8m 52s
    14. Styling form layout
      11m 49s
    15. Adding form interactivity
      2m 47s
    16. Using Spry validation widgets
      12m 49s
  14. 1h 23m
    1. Planning for templates
      10m 51s
    2. Creating a new template
      10m 37s
    3. Using editable attributes
      13m 43s
    4. Creating optional regions
      6m 23s
    5. Creating new pages from a template
      9m 17s
    6. Applying templates to existing pages
      6m 9s
    7. Working with nested templates
      7m 56s
    8. Working with repeating regions
      12m 58s
    9. Modifying templates
      5m 41s
  15. 40m 14s
    1. Behaviors overview
      3m 47s
    2. Hiding and showing elements
      9m 18s
    3. Spry overview
      4m 4s
    4. Using Spry widgets
      11m 36s
    5. Adding Spry effects
      3m 6s
    6. Using the Widget Browser
      8m 23s
  16. 28m 18s
    1. Inserting Flash files
      5m 4s
    2. Setting properties for Flash
      6m 27s
    3. Dreamweaver and Flash integration
      6m 6s
    4. Encoding Flash video
      6m 10s
    5. Adding Flash video
      4m 31s
  17. 45m 28s
    1. Running site-wide reports
      6m 33s
    2. Checking for broken links
      5m 41s
    3. Checking for browser compatibility
      8m 3s
    4. Adding remote servers
      8m 0s
    5. Uploading files
      7m 20s
    6. Managing remote sites
      9m 51s
  18. 34s
    1. Goodbye
      34s

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Dreamweaver CS5 Essential Training
15h 22m Beginner Apr 30, 2010

Viewers: in countries Watching now:

In Dreamweaver CS5 Essential Training, Adobe Certified Instructor James Williamson explores the tools and techniques of Dreamweaver CS5, Adobe's web design and development software. This course covers both the ins and outs of Dreamweaver, as well as recommended best practices for crafting new web sites and files, the fundamentals of HTML and CSS, and how to ensure clean and accessible code. The course also includes how to use tools in Dreamweaver to create and style web pages, manage multiple sites, and add user interactivity with widgets and scripting. Exercise files are included with the course.

Topics include:
  • Defining and structuring a new site
  • Creating new web documents from scratch or from templates
  • Adding and formatting text
  • Understanding style sheet basics
  • Placing and styling images
  • Creating links to internal pages and external web sites
  • Controlling page layout with CSS
  • Building and styling forms
  • Reusing web content with templates
  • Adding interactivity
  • Working with Flash and video
Subject:
Web
Software:
Dreamweaver
Author:
James Williamson

Modifying image properties

One of the constant challenges in working with sites built around clean HTML and CSS is precisely what to control with CSS and what to control through the HTML? Working with images is a particularly great area, since there are many properties that you can control, either through CSS or directly through the image itself. In this movie, we are going to discuss the image properties you can change using Dreamweaver's Properties Inspector and the benefits of controlling these properties through the Image tag or through CSS.

So here we have the explorers.htm file opened up, and I want to scroll down just a little bit to examine this image on our page. So I am going to select the image of the couple at the bistro, and I am going to turn our attention down here to the Properties Inspector. So there is a lot of stuff going on here, and if you are looking at the stuff for the first time, it can almost be a little overwhelming, like what is all this stuff and what can I do with it, and what should I be doing with it? Well, let's just go through it one piece at a time. First off, in the upper left -hand corner we have an ID.

You could set an ID, which would also assign both an ID and a name attribute to this image. Now, why would that be valuable? Well, an ID and name can be very valuable because it could be tied into the CSS you are currently doing. So doing that could help you style your image. You might be also hooking into different type of JavaScript functions that you have written for this page. So perhaps that would trigger a CSS based rollover if you have the JavaScript written for that, or integrate it into part of the JavaScript app because for JavaScript to control an object on a page, the object has to have a name or an ID attribute, and that's one of the things that we would be able to do through the use of that.

Now, just beside that you'll notice that we have a width and height. Now to be honest, you really should never change this, and you basically want to make sure that when you save the image out it's the width and the height that you need it to be. But Dreamweaver does give us those options. In fact, Dreamweaver gives us these handles, and we can grab those, and we can make that image as wide and as tall as we want it to be. I don't think we help the image out there. There is an old saying: Just because you can, doesn't mean you should, and that certainly is applicable here.

But look what Dreamweaver did for me though. It says, "Hey you've changed this, and you've changed this." How do I know that? Because the text is bold. So if you see a measurement there that doesn't look quite right, that's a clue to you that maybe one of your other teammates or somebody or maybe even you, the night before when you were working really late, changed that without meaning to. Well, Dreamweaver gives us another nice little tool as well. We have a little Refresh button there and if I click that, it's going to reset that image to its proper size, sort of undoing that damage that I just did. So you want to be kind of careful about that.

We also have, right beside, that a source property. Now, I want to point out exactly what the Source property does for you by switching to a Split View, so that we can see both the Image tag and the image at the same time. Images are controlled through the use of this Image tag, img, and this attribute in the Properties Inspector, Source, is the Source attribute right here on our tag. The Source attribute is telling the browser or user agent where to go find that image. So in this case, it's saying go look in the Images directory and find lunch.jpg.

So changing this through the use of the Point to File icon or typing something in or placing an image on the page is going to actually set that attribute within the code. We also have a Link attribute, so if you wanted to make this image a clickable link that people could click on to go to another page, you would enter that information there, and we have a Target. Right below that, the Target property is linked to the Link property. If you wanted to, say, open up the page that you are linking to in a new browser window or a new tab, you could use the Target pulldown menu to do that.

We also have our alt text. We've talked about that in some previous movies, but if you want to manually set that alt text, you could highlight that there and then choose that. We also have some editing options here. Now we've covered these in some of our previous movies, but very briefly if you want to edit this image, you can simply click on this icon to edit it in the program of your choice, in this case Photoshop. But we also have an Edit Image Settings icon that we haven't really talked about yet. If you ever need to re-optimize an image, maybe something was saved at too high of a compression, or maybe an image was saved and it's just a little too large, you can click that, and you're going to get your Image Optimization dialog box that comes back up, and you get to choose which settings you like this image to have.

You need to be very cautious about using this, especially if you're working with JPEGs. Remember, JPEGs are optimized every single time they are saved. So you are going to be throwing image data away. So you are not going to be improving the image quality of something by doing this, you are, in most cases, going to be degrading the image quality. So typically this is only done if you really need to save file size. My advice is to go ahead and make sure you export the graphic out of Photoshop or whatever program you are working in, the size you need it originally, and that way you'll avoid having to worry about that.

Now, turning our attention to the bottom row, right here, we see controls for making an image map. Image Maps are not as widely used online as they were say 5, 6, 7, 10 years ago. But they are a viable way of creating areas within your image that can be linked. So for example, if I wanted to highlight this glass of lemonade and make it link out to one page and highlight her hat and maybe link out to a page about hats, I could certainly do that by using this Image Map and drawing hotspots around those link areas.

We have a property called V Space, which is vertical space, and H Space, which is horizontal space. This image is currently just sort of floating right in our text, and it shows us something about images. There are inline level elements and browsers and user agents, just flow them right in with the rest of your copy. In this case, when your image is so much larger than your text, it gives you a very weird layout. So V Space and H Space are going to help you do things like move the text away from the image. For example, I could go into H space here and type in 10, and it would give me 10 pixels of space.

It would push that text away from that. Now, if you were paying attention, you've probably also noticed that it pushed the image away from the edge of the container as well. So H Space goes horizontally on both the left and the right side. We've got 10 pixels worth of space on both of those sides. Vertical Space would give a space above and below. So we don't get to pick one side over the other. It just kind of happens to both sides. We have a little dialog box here for Original and if I have a Photoshop image that is the original source file for that, I can let Dreamweaver know about it within that dialog box, and then if I click to edit the image, it will instead open up the Photoshop file rather than the JPEG.

That can save you a lot of time and effort from having to go hunt down and open up that Photoshop file yourself. The last couple of settings I want to show here. Border, we can enter in a border for a graphic. Let me show you what I mean. If you do that, you're going to get sort of that three-dimensional sort of grooved border that browsers put in, and honestly it's going to be up to the browser. Chrome has got its own version of the border. Firefox has its own version of it. So you're not really controlling exactly what border type you want. You're not in control of that. That's why I would recommend, if you really want to border around your graphic, use CSS to do that.

If you are going to make a link out of this graphic, it might be a good idea to come in and type in Border 0. That way, you won't have any type of decoration or blue border around the image. Some browsers use that as a default. If an image has a link, it'll put a blue border around the image without you asking it to. We also have a couple of tools here that allow us to crop our images, allows us to sharpen our images, change the brightness and contrast, and these are kind of neat tools. But again, I'm of the mind that you should probably do this in a program that's designed to do it, such as Photoshop.

But notice if I choose to increase the brightness and contrast of this image, I can go ahead and increase the contrast, and make some fairly dramatic changes to my image. Maybe that's what I want to do, maybe that's not what I want to do, but frankly I don't think that this is the right place to do that. You should probably open that image back up in Photoshop or Fireworks, tweak it, do what you need to do to it, save it back out again, and come back in Dreamweaver. But for small changes or maybe changes where you don't have access to the software, it's not a bad tool to use.

Now, I am going to go ahead and click OK here, but the thing I want you to remember is that I have just made a permanent change to that image. The moment I saved this page and closed it, I've literally changed that JPEG graphic. So if it's being used on any other page, I've changed it there as well. Finally, I want to talk about the Alignment option down here. This confuses a lot of people, because if we grab this pulldown menu, you can see we have a lot of options. We have Baseline, Top, Middle. What is all this stuff? Well, typically, this was created to deal with image captions, a single line of text. So if chose Middle, for example, notice that the line of text that it is a part of aligns to the very middle of the graphic, however, the rest of text doesn't wrap around it at all.

But if you do want to have the text wrap around image, you do have a couple of choices with this. If I go to the Align pulldown menu and I choose Left, notice that the image aligns to the left of the text. If I choose Right, the image aligns to the right of the text. Here the horizontal space is helping us keep the text away from the image. So if I take the back down to 0, you can see the text is budding up right against the image. But of course, the downside of this, and I'll go back to using 10 here is that it moves the image away from the edge of the container as well. So you get it on both sides. So that is one way to achieve that look.

Now what's wrong with doing that in HTML versus CSS? Nothing. It's a personal choice. However, it's not as flexible. By saying, Image Align, Right, we are flowing our text exactly where we want, but we have very little control over the spacing of this and how it's placed within the text. You can see we have our H and V Space properties, but it's really pushing the image away from edge of container too, and that's really not what I want at all. So I am going to remove my H Space, and I am going to take my alignment back to Default, because there is another way to do this, and it would be modifying our images through CSS.

If I select this graphic, I have one more option available to me here in the Properties Inspector. I have this little Class pulldown menu. I am going to grab that, I am going to go up, and I am going to choose Article Image and sure enough, it aligns over to the right just like I wanted it to. It gives me enough padding, 16 pixels worth off of this, so that the text isn't budding right up against the image, and it keeps it aligned to the right edge, which is exactly what I want it to do. So in this case, Cascading Style Sheets were a better choice than modifying the image HTML properties themselves.

So how do you style images through CSS? Well, we are going to cover that in our next exercise but for now, I think you can see that there are a ton of properties you can change once an image has been placed on the page. Now, based on what the focus of your CSS is, you may want to control a lot of those properties through your styles rather than through the image itself. In the long run, that's going to create less work when modifying similar image properties across the entire site. Be extremely careful when resizing or editing the image from the Properties Inspector.

The image quality may degrade, so you want to test that thoroughly before committing to any changes.

Find answers to the most frequently asked questions about Dreamweaver CS5 Essential Training.


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Q: After creating a website following the instructions in the course, the header background graphic appears correctly in all browsers except Internet Explorer 6 and Internet Explorer 7.  The graphic works properly in IE 8. What can be done to make the graphics appear in IE 6 and IE 7?
A: To make the header background graphic appear, wrap the header div tag in another div tag and give it an ID like “mainHeader.” The problem stems from a bug in Internet Explorer that prevents the browser from dealing with absolutely positioned elements that are right next to relatively positioned elements.  Following the steps above should solve the problem.
Q: In the tutorial, the author links the Tool Tip to the word "More" at the bottom of the thumbnail photo field. I can't figure out how to place the <a> "More" on the thumbnail photo field.
A: In the example, there is a paragraph that wraps an <img> tag and the word "More," which is surrounded by an anchor tag (<a>). The author uses CSS to make sure the parent div tag of the thumbs floats to the left, and is only wide enough for the image. This causes the link text to break down onto another line. Then, the instructor uses CSS to align the link text to the right of the <img>. The link itself is a void JavaScript function, ( javascript();). This gives you a "dummy" link without returning you to the top of the page as the "#" dummy link tends to do.
If you were manually typing the text in, you could select the image, hit the right arrow button, and begin typing. The text should then appear on screen.
Q: In this movie, you are making changes to the HTML in order to customize the text layout on your page (i.e. h1, h2, and h3 tags as well as strong and em tags). I'm wondering why you are not using CSS to do this (i.e. font-size, font-weight). Do you typically use one method, or is it customary to do use both in a layout, and if so, what guidelines would you suggest to determine which to use when?
A: We modify the page's structure through the use of h1, h2, and other heading tags. So when we are choosing heading levels, we're not concerning ourselves with typography; we're establishing page structure. A heading is chosen to denote the level of importance for the heading, not typography.
CSS should always be used for presentation, not HTML.
Q: In the “Understanding ID selectors” movie, the author states that only one ID tag can be used per page, but then he adds two ID tags. Can you please clarify this for me?
A: You can use as many IDs per page as you wish. They just must all use a unique name. Therefore if you assign an element the ID of "header" no other element on THAT page may use the same ID.
Q: I noticed that in this course, the instructor uses this code on his CSS external sheet: @charset "UTF-8"; I was under the impression that this code wasn't necessary. The W3.org site is unclear on the matter. Is it necessary? Is it a best practice? Is it an older form of CSS?
A: The characterset attribute is added automatically by Dreamweaver, and there’s no practical reason to remove it. While it's not needed (the HTML page should indicate which encoding to use for the page) it is helpful if the CSS file is ever imported or used on a page where the characterset isn't specified. Think of it as a safety net for characterset encoding. Not necessary, but not harmful either.
Q: I need to add captions below images that I insert in pages of text. I played all the lessons in Chapter 5 (Adding Text and Structure) but none dealt with captions. I hope the author has an answer or can refer me to a source.
A: In HTML 4 and XHTML 1 (which is what Dreamweaver CS5 uses by default), there wasn't really a way to add captions below your photos. Most web authors would "fake" captions by having paragraphs of text below their images and using CSS to position and style the captions in the desired manner. Many would use a class such as .imgCaption to control the styling. To do this you would essentially position the text underneath the image through CSS (often by grouping the image and the paragraph in a div tag) and italicizing the text.

However in HTML5, there are new elements that allow us to associate images and their captions, the figure and figcaption element. Our author James Williamson just finished a course on HTML5: Syntax, Structure, and Semantics which details how to use it.

HTML5 Doctor also has a nice article on the figure and figcaption elements at http://html5doctor.com/the-figure-figcaption-elements/.
 
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