Dimensioning within a viewport in PaperSpace paper space will provide dimensions of the object's 2D projection onto the monitor screen, not of the object itself. The dimensions will be scaled correctly according to the scale of the view, but misleading .
Misleading dimensions can result if the monitor screen the viewport is not exactly parallel to the object.To dimension an object in non-parallel views within a viewport, you must enter the correct measurements manually in the Inspector Bar or in the dimension's Properties. When non parallel views are used, dimensioning is best done in Model Space.See Viewports. Therefore attempting to dimension an Isometric view by this method is not advised.
The dimensions will be associative to model and drawing elements through viewports in paper space layouts. These associative dimensions will update with model and drawing changes. This is automatic, but only applies to the following objects:
- Solid objects
- 2D objects
- Surface objects