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Polygonal Lasso tool and Quick Mask

From: Photoshop CS6 One-on-One: Fundamentals

Video: Polygonal Lasso tool and Quick Mask

In this movie, I'll show you how to use the Polygonal Lasso tool to build the rays that are emanating out of the moon inside the final composition. I'm still working away inside Daytime moon.psd. We have one triangular ray that we've created so far and we're going to create the other ones using the Polygonal Lasso. To get to it, go up to the Lasso tool flyout menu, Click+Hold and choose the Polygonal Lasso tool from the flyout menu. You can also press Shift+L. And then you need to press the Shift key so that you get a little plus sign next to the horned lasso cursor and that tells you that you'll end to the existing selection outline, then click at the center of the image where the guidelines intersect.

Polygonal Lasso tool and Quick Mask

In this movie, I'll show you how to use the Polygonal Lasso tool to build the rays that are emanating out of the moon inside the final composition. I'm still working away inside Daytime moon.psd. We have one triangular ray that we've created so far and we're going to create the other ones using the Polygonal Lasso. To get to it, go up to the Lasso tool flyout menu, Click+Hold and choose the Polygonal Lasso tool from the flyout menu. You can also press Shift+L. And then you need to press the Shift key so that you get a little plus sign next to the horned lasso cursor and that tells you that you'll end to the existing selection outline, then click at the center of the image where the guidelines intersect.

And once you've clicked, you can release the Shift key, you only have to press it right there at that first click point. And notice that I've click the second time out here in the pasteboard. And then at the third point, I can just double-click in order to finish the selection. And then I would Shift+Click again at the center, click out here in the pasteboard, double-click in order to create another ray and so forth. You may find it inconvenient to have to press the Shift key over and over again and that's what these icons are for, up here at the outside of the Options Bar.

They allow you to apply so called Selection Calculations. Now, the first one which is selected by default reads New Selection. So if you click without holding a key, you'll deselect the existing area and start a new selection. However, if you move over to the second icon, notice that it reads Add to Selection. Go ahead and click on it to select it and now you don't have to press the Shift key anymore because your cursor automatically has a plus sign. You can click at the center, click on the pasteboard, double-click, and then click in the center, click out here in the pasteboard, double-click.

And we're keeping it random the whole time, so sometimes you want slim little triangles like so, and other times you want thicker triangles, and you want different amounts of space between each one of these rays and so forth. Now it might be a little tedious watching me create these things, which is why I've gone ahead and saved the selection along with the image. I'm going to load it up by going up to the Select menu and choosing the Load Selection command. And then inside the Load Selection dialog box, if you are working along with me, make sure Document is set to the document you're working inside of, and then make sure Channel is set to half rays.

Now these should all be set this way by default. The Invert check box should also be off and Operation should be set to New Selection. If all that is true, then just go ahead and click OK in order to load up that selection outline. Now notice that I've only selected the top half of the image, and that's because I decided drawing half the rays was enough and I could go ahead and duplicate the selection and rotate it a 180 degrees to create the rest of the rays. But to do that, you have to enter a special mode called the Quick Mask mode.

And you can switch to the Quick Mask mode by clicking on this Edit in Quick Mask Mode icon down here towards the bottom of the toolbox, and notice that it looks like a dotted circle inside of a rectangle. Go ahead and click on it and you see this Rubylith Overlay. And here's what it means, anywhere that you see the red overlay, that's a deselected region of the image. Wherever you don't see the red overlay, is selected. Now I'm going to select the top half for this mask using the Rectangular Marquee tool. Now if you're working along with me, make sure to change the Style Setting from Fixed Size back to Normal so you can draw an unconstrained rectangle.

And then go ahead and select the entire top region of the image, all the way down to the horizontal guideline. Now at this point, we need to rotate the selection using the Free Transform command, and you may have recalled me mentioning that the Free Transform command under the Edit menu has a keyboard shortcut of Ctrl+T or Command+T on the Mac. If you add the Alt key or the Option Key on the Mac, you go ahead and duplicate the selection as well. And so, in order to make this work we have to use the shortcut. And so, I'm going to Escape out of the menu and press Ctrl+Alt+T here on the PC, that would be Command+Option+T on the Mac.

And then, I'll zoom in just a little bit here. Notice that target right there at the center of the selection? I want you to drag it down so that it snaps into alignment with the guide intersection, right there at the bottom handle. And that indicates the center of our rotation. Now I'll right-click inside the image and choose 180 degrees and you'll end up rotating and duplicating those spikes. Now you can press the Enter key or the Return key on a Mac in order to complete the transformation and press Ctrl+D or Command+D on the Mac to deselect the image.

Now we need to convert the mask back into a selection outline and you do that by dropping down to that icon at the bottom of the toolbox once again. Now it says Edit in Standard mode. Go ahead and click on it. And so, the marching ants and the Quick Mask mode are just two different ways to look at the selection outline. And incidentally, you can switch between them from the keyboard by pressing the Q key. So tap the Q key to go to into the Quick Mask mode, tap it again to exit the Quick Mask mode and see the marching ants. And that's how you create a straight -sided selection outline using the Polygonal Lasso tool.

And as you can see, you can make your selection outlines as intricate, not to mention, accurate, as you like.

Show transcript

This video is part of

Image for Photoshop CS6 One-on-One: Fundamentals
Photoshop CS6 One-on-One: Fundamentals

100 video lessons · 56355 viewers

Deke McClelland
Author

 
Expand all | Collapse all
  1. 19m 15s
    1. Welcome to One-on-One
      2m 27s
    2. Opening from the Windows desktop
      4m 7s
    3. Opening from the Macintosh Finder
      4m 9s
    4. Opening from Photoshop or Bridge
      2m 45s
    5. Opening an image from Mini Bridge
      1m 16s
    6. Opening through Camera Raw
      2m 32s
    7. Closing one image and Closing All
      1m 59s
  2. 38m 14s
    1. Navigating your image
      40s
    2. The dark vs. the light interface
      3m 12s
    3. Navigating tabs and windows
      4m 32s
    4. Panels and workspaces
      4m 27s
    5. Zooming incrementally
      4m 29s
    6. Zooming continuously
      2m 43s
    7. Entering a custom zoom value
      2m 25s
    8. Scrolling and panning images
      2m 31s
    9. Rotating and resetting the view
      2m 11s
    10. Cycling between screen modes
      3m 10s
    11. Using the Navigator panel
      3m 38s
    12. Adjusting a few screen prefs
      4m 16s
  3. 45m 58s
    1. Digital imaging fundamentals
      1m 45s
    2. Image size and resolution
      3m 3s
    3. The Image Size command
      3m 27s
    4. Common resolution standards
      3m 20s
    5. Upsampling vs. real pixels
      4m 36s
    6. Changing the print size
      6m 16s
    7. Downsampling for print
      4m 12s
    8. Downsampling for email
      3m 11s
    9. The interpolation settings
      5m 22s
    10. Downsampling advice
      4m 36s
    11. Upsampling advice
      6m 10s
  4. 53m 17s
    1. The layered composition
      1m 40s
    2. Introducing the Layers panel
      4m 12s
    3. Adding, scaling, and aligning layers
      5m 27s
    4. Dragging and dropping layers
      4m 36s
    5. Stack, reveal, and rename
      2m 58s
    6. Opacity, history, and blend mode
      6m 5s
    7. Duplicating a selected portion of a layer
      5m 32s
    8. Applying a clipping mask
      3m 58s
    9. Blending inside a clipping mask
      4m 10s
    10. Finishing off your artwork
      3m 13s
    11. Creating a new layer and background
      4m 24s
    12. Layering tips and tricks
      7m 2s
  5. 26m 19s
    1. The art of saving
      54s
    2. Four things to know about saving
      6m 0s
    3. Saving layers to PSD
      6m 38s
    4. Saving print images to TIFF
      4m 48s
    5. Saving an interactive image to PNG
      3m 41s
    6. Saving a flat photo to JPEG
      4m 18s
  6. 19m 36s
    1. Honing in on your image
      1m 43s
    2. The new and improved Crop tool
      3m 35s
    3. Editing your last crop
      3m 1s
    4. Straightening a crooked image
      2m 29s
    5. Filling in missing details
      6m 44s
    6. Using the Perspective Crop tool
      2m 4s
  7. 42m 6s
    1. First, there is brightness
      2m 12s
    2. How luminance works
      4m 18s
    3. The three Auto commands
      3m 27s
    4. Automatic brightness and contrast
      3m 19s
    5. The Brightness/Contrast command
      2m 47s
    6. The dynamic adjustment layer
      4m 5s
    7. Editing adjustment layers
      3m 52s
    8. Isolating an adjustment with a layer mask
      3m 31s
    9. Introducing the histogram
      4m 58s
    10. Measuring an adjustment
      3m 34s
    11. Using the Shadows/Highlights command
      6m 3s
  8. 44m 33s
    1. And second, there is color
      1m 31s
    2. Identifying a color cast
      3m 34s
    3. Correcting a color cast automatically
      3m 57s
    4. Changing the color balance
      6m 10s
    5. Compensating with Photo Filter
      3m 11s
    6. Adjusting color intensity with Vibrance
      3m 29s
    7. Correcting color cast in Camera Raw
      5m 46s
    8. The Hue/Saturation command
      5m 26s
    9. Summoning colors where none exist
      4m 8s
    10. Making more color with Vibrance
      4m 27s
    11. Making a quick-and-dirty sepia tone
      2m 54s
  9. 55m 46s
    1. Making selective modifications
      1m 10s
    2. The geometric Marquee tools
      6m 1s
    3. Aligning one image element to another
      4m 59s
    4. The freeform Lasso tools
      3m 59s
    5. Polygonal Lasso tool and Quick Mask
      5m 19s
    6. Cropping one selection inside another
      6m 15s
    7. Creating rays of light
      4m 44s
    8. Quick Selection and Similar
      4m 11s
    9. Making it better with Refine Edge
      4m 56s
    10. Integrating image elements
      2m 39s
    11. Magic Wand and Grow
      5m 17s
    12. Refine, integrate, and complete
      6m 16s
  10. 53m 49s
    1. Your best face forward
      1m 0s
    2. Content-Aware Fill
      6m 11s
    3. Using the Spot Healing Brush
      5m 36s
    4. The more capable "standard" Healing Brush
      5m 55s
    5. Meet the Clone Source panel
      3m 53s
    6. Caps Lock and Fade
      4m 57s
    7. The Dodge and Burn tools
      5m 1s
    8. Adjusting color with the Brush tool
      6m 35s
    9. Smoothing skin textures
      5m 58s
    10. Brightening teeth
      4m 0s
    11. Intensifying eyes
      4m 43s
  11. 51s
    1. Goodbye
      51s

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