Modifying selections After you make a selection using any selection technique, you can use modifier keys to alter the selection with the Marquee, Oval Mar- quee, Row Selection, Column Selection, and Lasso tools. To add to a selection:  Press Shift when you use a selection tool. A “+” symbol indicates that the tool will add the new selection to the existing selection. To subtract from a selection:  Press Command (Mac) or Ctrl (Windows) when you use a selection tool. A “-” symbol indicates that the tool will subtract the new selection from the existing selec- tion. To select part of a selection:  Press Shift+Command (Mac) or Shift+Ctrl (Windows) when you use a selection tool. An “x” symbol indicates that the area you select in the existing selection will remain selected. If none of the new selection is part of the existing selection, Canvas deselects all pixels. You can also use Shift or Ctrl to constrain a selection when you add, subtract, or intersect a selection. To do this, press the keys to add, subtract, or intersect and begin dragging. While still pressing the mouse button, release the keys and then press the constraint keys and continue dragging. Selecting areas based on color You can use the Wand tool and the Color Range command to select pixels in an image according to color. To select a contiguous area of similarly colored pixels, use the Wand tool. To select all pixels of a particular color, use the Color Range command. To use the Wand tool 1 Select the Wand tool in the Toolbox and point to the object you want to edit. If the paint object is not in edit mode, the pointer becomes a hand ( ). Click the object to put the image in edit mode. The pointer becomes a wand. 2 Click the color area you want to select. To add to a selection:  Shift-click the Wand in the image. The pointer displays a ‘+’ to show that it adds to the current selection. Wand tool
Canvas 8 Help: Selections and channels (4 of 32)                                                    Page #654