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Now that we know a little bit about bit depth and a little bit about image size, we are ready to put our knowledge to practice. In this movie, we are going to be working on a couple of images you can find in the 04 The Digital Image folder. Now if you don't have these images, no big deal. Feel free to follow along or to use your own images. Let me go ahead and select the first image and then hold on the Command key on the Mac, Ctrl key on the PC to select the second image. Now both images are selected. I want to then open them here in Photoshop and here's one way to do that. Right-click or Ctrl-click and choose Open. Now once these images have been opened in Photoshop you will notice that they are consolidated to this one window and there are two tabs. Now if you don't want these images to open up in this tabbed format, all that you need to do is navigate to the Photoshop pulldown menu and choose Preferences. On the PC it's Edit > Preferences.
We will go ahead and open up General and then we are going to go over Interface. Now under the Interface option, we can check this option of Open Documents as Tabs, we turn that off. They will then open as free-floating windows. My preference is to leave it on, so we are going ahead and do that. That was just a side note, but I thought it was worth while to, throw it in there as this was the first time that we have opened up Multiple Images in this training movie. All right, well, the first image we are going to be working on is Resize Instructions, so I'll press F to go to Full Screen View mode, Tab to get rid of the interface and then F for more time to go to Full Screen View mode.
Minimizing the interface completely. Well, now that we are here, I want to walk through a few steps that we have for resizing an image. First of all, you will notice that at the bottom of screen there is shortcut, on a Mac the shortcut is Option+Command+I for Image Settings. On a PC that is Alt+Ctrl+I. That will then open up the Image Size dialog window. Okay, great, well now that I have the Image Size dialog window, I'll push this over to the side for a second. What do we need to do to actually resize our image is? Well the first thing we need to do is to turn Resample off, so I'm going to go ahead and turn Resample off. Now what that does is it says, you know what? Don't touch the raw material; leave that as it is. Remember the kidney bean analogy? Don't get rid of any of my kidney beans. Okay great. So we have done that.
The next step is to then change our Resolution to whatever we are going to be printing at. Let's say we are going to print at 300 pixels per inch, okay great. Now I'm going to turn Resample back on and then finally I can resize. So currently I'm looking at the file that's a real low risk file, I can print this approximately two by two-and-a-half, and it's going to be a little postage stamp, right? So I don't have a lot of flexibility because this image has already been sized down and typically it's a good idea to take a big image and size it smaller although you can resample up or size your image up typically it's not a great idea, all right.
Well, now that we have seen these steps. So we have seen our 1 through 4, Resample Off, Res., Resample On and then Resize. Let's take a look at how this will actually work on an image. I'll press the F key to exit Full Screen mode, then I press the Tab key to bring back the rest of the interface. Here we are picking up a few good shortcuts along the way. All right, here's another shortcut for you. I want to navigate to the other image and I'm going to do that by way of a shortcut. It's Ctrl+ Tab on a Mac or PC. Now if you don't want to know that shortcut no big deal, simply click on the tab to access that image as well. Let's press F to go to Full Screen View mode, press the Spacebar and then reposition the image near the upper part of the screen, so you are looking up, not looking down that way you have got posture and you are fired up and you are ready to go.
All right, well, I have this photograph of this W from an old neon sign. I just love pilling paint some reason, really love the colors of this. So let's go ahead and open up the Image Size dialog window. This time I'm going to do that by simply clicking on the Image pull down menu and then choosing Image Size, if you want to use the shortcut, you can there it is. All right, well this then opens up the Image Size dialog window. Now you remember the steps right, the first step is to click Resample off okay great, don't touch those pixels, I just want to work on the resolution. Next I want to define the resolution, how do I want to print this bad boy well you are going to print it at 300 pixels per inch okay great. I'm then going to click Resample Image back on, now here's where I get to do some resizing. Now what I want to do is print this as a 4x6 print, now there are number of different ways that I can change the over all pixel dimensions in the document size. I can click and change the number here to six, which gives me 4.5x6. Interesting. I have to do some cropping. I can also use the scrubby sliders to change those numbers here as well and I can use scrubby sliders here or I can type in numbers up here as well and I'm watching my numbers. Basically what I'm looking to do is to reduce the size to make it fit this 4x6 print, so I'll go back and change my Width to a value of six. Yet, I always trying to illustrate is you can enter in values for any of these fields or use the scrubby sliders for any of those fields for pixel dimensions or for document size when you are at this final step for resizing. Keep in mind it's typically a good idea to work with images that are big and size them down.
Now which Bicubic Interpolation do we need to use? Well, in our case we want to use Bicubic Sharper, which is best for reduction. And I'm so excited that finally in Photoshop CS3 they included the information in the parenthesis, which now tells all of us which type of Image Interpolation is best. Well, so far so good, let's click OK. Well, now the image has been resized, press the Spacebar tool to reposition it there, yet it's not exactly 4x6 so how can I resize this image completely? Well, grab the Crop tool here. With the Crop tool I'm going to type in six in for inches, four in for inches, four the height, Resolution you know the resolution right 300 pixels per inch. Now, I'll click and drag this Crop tool out over the image, now it's going to confine the Crop tool the proportion of the Crop tool to that 4x6 space. I'm going then to reposition this crop area over the image. Double-click to apply that crop. All right, voila! Let's open up our Image Size dialog window, Image > Image Size and take a look at what we have. We have a 4x6 at 300 pixels per inch, perfect. Now because these numbers are little bit more easy to look at, let's de-construct this Image Size dialog window a little bit further. 300x4 is what? 1200. 300x6 is what? It's 1800. So one of the things that we have seen here, is we are going to have a 4x6 image at 300 pixels per inch, it's going to be about 6 Megs in file size and we are starting to see where those numbers actually come from.
Yet if this is still a little bit confusing to you, stick with me and just keep in mind that we can follow this steps and the steps are Resample Off, Change your Resolution, Resample On and then finally Resize. Some of your resizing will happen right here inside of the Image dialog window, other resizing will happen with the Crop tools we have seen before. Let's click OK to cancel out of this. Now with the Crop tool what type of Image Interpolation is it, using here when it resized the image. Well, it's using whatever we have setup in our Preferences on the Mac navigate to Photoshop > Preferences > General. On a PC navigate to Edit > Preferences > General and then look at your Image Interpolation, so I have set the Default setting to Bicubic Sharper, because typically when I'm using that Crop tool, I'm sizing the images down, all right well, that looks pretty good, that Preference, so I just want to double check that make sure it's good to go and the last thing I want to do is double-click the Zoom tool. That will then take this image to 100%. When I grab this Spacebar and I'm going to move around this image a little bit and I want to look at the detail here, I want to make sure this image is nice and sharp, you know what it is I like the way that's looking. Double click the Hand tool which will take it to fit in View mode so I can see the entire image and then I'll press Command+Minus on the Mac/Ctrl+Minus on the PC to zoom out even more, I just want to step back a little bit from the image, make sure my crop looks pretty good.
That does, press F once to go to Full Screen View mode to evaluate the image in this final view here, that looks pretty good and in addition, we have learned some interesting shortcuts and tricks along the way and we have learned how to successfully resize our images.
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