Creating paths to clip a layer
You can use a vector path to clip a layer, creating a sharp-edged mask on that layer. In this part of the lesson, you'll draw a circle and use it to knock out the holes in the metal grille image. This will let you see through the holes to the layers below.Drawing the vector work path
You'll begin by drawing the basic path on the Metal Grille layer.
| 1. | Click the Metal Grille layer in the Layers palette to select it. | | 2. | Select the Ellipse tool ( ), hidden behind the Rectangle tool ( ). (Be careful not to select the Elliptical Marquee tool.) On the tool options bar, click the Paths option ( ).  | | 3. | Move the pointer to the center of one of the holes in the metal grille and start dragging. Then, hold down Shift-Alt (Windows) or Shift-Option (Mac OS) and continue to drag until the circle is the size of the hole. Carefully release the mouse button first, and then release the keyboard keys.  NoteIf the circle is not exactly centered when you're done, hold down Ctrl (Windows) or Command (Mac OS) and drag the circle path into position. If the circle fills with black, choose Edit > Undo, and repeat Step 2, making sure that you select the Paths option on the tool options bar.Next, you'll make copies of the circle for the rest of the metal grille. | | 4. | In the toolbox, select the Path Selection tool ( ), which is beside the Type tool, and click to select the circle you just drew. | | 5. | Hold down Alt (Windows) or Option (Mac OS) so that a small plus sign appears below the pointer icon ( ), and then drag the circle to place a copy of the path over another hole in the metal grille. | | 6. | Repeat Step 5 to place copies over the remaining holes, including the holes that extend outside the edges of the image. |
 | When you have copies of the circle path over several holes, you can Shift-click to select them all, and then Alt-drag or Option-drag to duplicate and move them. |
NoteYou can adjust the position of a selected circle using the arrow keys on the keyboard. You may also find it helpful to choose View > Snap To, and deselect any of the commands that are checked on the Snap To submenu so that none of them are active.Creating a layer mask from the work path
You're ready to use these circles as a layer vector mask.
| 1. | Shift-click to select all 16 circle paths. | | 2. | On the tool options bar, click the Subtract From Shape Area option ( ), or press hyphen (-) to select it with the keyboard shortcut.The subtraction option sets up Photoshop to use the circle shapes to define where it will remove pixels from the layer, so those areas of the Metal Grille layer become transparent when you apply the path as a vector mask. | | 3. | Choose Layer > Vector Mask > Current Path.The Rust layer appears through the holes you cut in the Metal Grille layer. In the Layers palette, a thumbnail of the vector mask appears in the Metal Grille layer.  | | 4. | Click the Dismiss Target Path button ( ) on the tool options bar to deselect the multicircle path you created. | | 5. | Choose File > Save to save your work. |
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