To Control Extension Line Visibility (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, select the first and/or second extension line to toggle visibility.
4. Click OK.
5. Click Power Dimensioning tabClose panel Close Editor. Find