1. Select the object(s) with the Pick tool
2. Open the Outline tool flyout and click Outline Pen .
3. Enable one of the Corner Style buttons from the Corners section:
Beveled Corners produces beveled corners.
Mitered Corners produces mitered (pointed) corners.
Rounded Corners produces rounded corners.
Note
Setting the corner shape can greatly affect the appearance of lines and
curves, especially if the object has a particularly thick line weight or the object
is particularly small.
How to
To apply an outline color using the Outline dialog box
To remove an object’s outline using the Outline tool flyout
To create a dashed outline using the Outline Pen dialog box