This is a Post by Rachel Jones at Concurrent Engineering.
It is now possible to change a corner type with just a few clicks.
Simply select a corner face, and then select Edit Corner Seam in the mini toolbar (or the Flexible Modeling tab of the ribbon).
Next, Right-click any area in the graphics section to open the context menu and select from different types including Blind, Gap, and Overlap. The corner type is updated instantly.
Content Source: Concurrent Engineering