To Create a Balloon With the Leader Starting at a Specific Place (AutoCAD Mechanical Toolset)

Click Annotate tabBalloon panelBalloons. Find
Examine the prompt and verify that the current BOM setting is correct.
Press O to select the One option.
In the drawing area, select a part reference or component (part or assembly).
Note: When you place the pointer over a part reference or component, a tooltip appears.
In the drawing area, click the position to place the start point of the balloon.
In the drawing area, click to indicate the second point for the balloon leader. Continue until the balloon is in the location you want.
Press Enter.
Press Enter again to end the procedure.