To set callout line ends

1. Select the callout you want to change.

2. On the callout ribbon, click the Line Ends button .

3. On the menu, click a line end (or No ends), or click Ends to display the Line Style tab of the Object Format dialog box.

On the Object Format dialog box, you can change the type of line end as well as its size, placement, and angle. You can also change the line thickness and style (solid, dotted, or dashed).