The crop region defines the boundaries for a project view. You can display a model crop region and an annotation crop region in all graphical project views. Perspective 3D views do not support the annotation crop region.
You can do the following:
The model crop region crops model elements, detail elements (such as insulation and detail lines), section boxes, and scope boxes at the model crop boundary. Visible crop boundaries of other related views are also cropped at the model crop boundary.
An annotation crop region fully crops annotation elements when it touches any portion of the annotation element, so that no partial annotations are drawn. Annotations (such as text notes and dimensions) that reference hidden or cropped model elements do not display in the view, even if they are inside the annotation crop region.
Datum elements (grids and levels) that cross the model crop region display their heads and tails so that they are visible inside the annotation crop boundary. Datum elements are not resized when you turn off the crop region, (the Do Not Crop View option) datum display at the original size they were drawn.
The annotation crop does not display by default when you show crop regions in a primary view. The annotation crop does display by default when you show crop regions in dependent views.