To Turn On or Off the Display of Dimensions in All Open Views

Do one of the following:

Choose View Attributes ( Drawing > View > Presentation > View Attributes ) (or press <Ctrl+B>).

or
From any view window's control menu, choose View Attributes.

or
In the view control bar, select the View Attributes icon or the adjacent downward-pointing triangle.

The View Attributes dialog opens.
Click the Apply to Open Views icon.
Turn Dimensions on or off.