To Change the Arrowhead on a Dimension (AutoCAD Mechanical Toolset)

1. In the drawing area, double-click the dimension you want to edit. The Power Dimensioning Ribbon Contextual Tab displays.
2. Click Power Dimensioning tabFormat panelEdit Geometry. Find
3. In the graphic showing the dimension, click the arrowhead.
4. From the arrowhead drop-down menu, select an arrowhead. The drawing area updates to reflect your selection.
5. Click OK.
6. Click Power Dimensioning tabClose panel Close Editor. Find