CHAPTER 5 (Simple web server) SELECTION 189 STARTING SELECTIONS You
CHAPTER 5 SELECTION 189 STARTING SELECTIONS You may remember that with most selection tools, clicking inside an existing selection will move the selection contents, rather than beginning a new selection. So Replace mode only replaces if you start the new selec- tion outside the boundaries of the old one. The same holds for the other selection modes: any new selection must usually be started outside the boundaries of the existing one. An exception is the Rectangle Select tool in GIMP 2.4, which does allow you to start a selection inside an existing one. Watch the cursor carefully whenever you start a selection, if there s already a selection active. The Move component of the cursor will tell you when you re still inside a selection. If you re outside, the cursor will show the icon for the selection tool you re using (Figure 5-20). You can t depend on the marching ants to tell you: if the selection is feathered, it may extend beyond the marching-ants boundary. Add mode adds the new selection to the existing one. In the Mauna Kea example, that s what I want: to keep the existing selection, but to add the sky at the top of the frame. The easiest way to do this is to choose the Rectangle Select tool, and set the mode to Add. Then make a rectangular selection that includes everything from the top of the frame down into the existing selection (Figure 5-20). A fast way to do this is in GIMP 2.4 is to start inside the existing selection and drag upward and over to one corner, and then adjust the other side of the rectangle so that it covers the other corner. With earlier GIMP versions, you can t do that because starting a new selection inside an existing one, even in Add mode, moves the contents of the existing selection; and you can t adjust the size of a rectangular selection once it s made.
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