★Failed to drag the viewport boundary in the multi-viewport state in model space

Issue:

Why cannot drag the viewport boundaries in the multi-viewport state to adjust the viewport size in model space?

Causes:

The system variable VPORTSDRAG controls whether the viewport's boundary can be dragged or not.

Solution:

Enter the command VPORTSDRAG, and set the new value to 1. Then we can drag the viewport boundary to customize the size.

Note: in the old version of 2024 or previous versions, the default value is 0, and also maybe due to some other reason, the value may be modified, so just follow the above steps to make it work.