Guidelines for applying corner shapes – Adobe InDesign User Manual
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2. To add corner effects, do any of the following tasks:
To adjust the radii of all four corners together, drag one of the diamonds towards the center of the frame.
To adjust a single corner, hold down Shift as you drag a diamond.
To cycle through the various effects, Alt-click (Windows) or Option-click (Mac OS) a yellow diamond.
3. To stop editing corners, click anywhere outside the selected frame.
To remove corner effects, choose Object > Corner Options, and then choose None.
If you don’t want the yellow box to appear when you select a frame, choose View > Extras > Hide Live Corners.
Guidelines for applying corner shapes
Note the following:
If you’ve obtained plug-in software that adds more effects, the Corner Options command in the Stroke panel can include additional shapes.
Corner effects appear on all of a path’s corner points, but never on smooth points. The effects change angles automatically when you move
a path’s corner points.
If a corner effect significantly changes the path by, for example, creating a bulge inward or outward, it may affect how a frame interacts with
its contents or with other parts of the layout. Increasing the size of a corner effect may push an existing text wrap or frame inset farther away
from the frame.
You can’t edit a corner effect, but you can change its appearance by changing the corner radius or modifying the stroke.
If you applied corner effects but can’t see them, make sure that the path uses corner points and that a stroke color or gradient has been
applied to it. Then increase the Size option in the Corner Options dialog box, or increase the stroke weight in the Stroke panel.
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