Tip
You can Option-click (macOS) or Alt-click (Windows) a corner widget in a shape to
cycle through the different corner types.
Note
You can press the Escape key to hide the panel before moving on.
- Select the Direct Selection tool ( ). With the shape still selected, double-click the top-corner
widget ( ). In the Corners dialog box, change the radius to 0 (zero), and click OK.