136 CHAPTER 4 DRAWING Tip To constrain (Managed web hosting)
136 CHAPTER 4 DRAWING Tip To constrain the Rectangle Select tool to a square, or the Ellipse Select tool to a circle, press the Shift key after you start dragging in the image. Pressing Shift first might sometimes work, but often it will give surprising results, which will be explained in Chapter 5. Outlining Selections: Stroking Stroking a selection outlines the boundaries of the selection. It s located in Edit . Stroke Selection…, and brings up the Stroke Selection dialog (Figure 4-15). Figure 4-15. The Stroke Selection dialog, with a rectangular selection active Stroke line will draw outlines using the current foreground color. You can specify the Line Width in pixels (or, if you choose, in some other unit). The default 6-pixel line is quite wide. Alternatively, you can stroke with a line-painting tool, such as Pencil or Paintbrush. The GIMP will act as though you had run that paint tool around the borders of the selection, using the current color and brush. (You can even make picture frames by stroking with a wide brush, especially if you use one of the more elaborate brushes, such as some of the animated ones.) Sometimes stroking with a paint tool, especially an antialiased tool like the Paintbrush, works better on curves than specifying a line width. Try it both ways on a circular selection and see.
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