I recently ran into an issue where we had a interior stud wall
that butts up to a Curtain wall or a Store Front wall.

The right click dialog box will pop up with the Option to Disallow
Join. Select this and it will then allow you to drag the end grip away from the
wall without it automatically joining the wall.
Similar to this:

Here you'll see a Stud wall butts up to the corner of a storefront
wall at the corner mullion.
As you can see here the Stud wall want to join the Curtain wall at
the location Line. In this case the Stud wall overlaps onto the corner Mullion
of the curtain wall.
You cant drag the point away from the corner as it will join the
Curtain wall.
Here is the solution to this problem.
If you pick the stud wall and right click right on the end control
grip.... like so.....
The right click dialog box will pop up with the Option to Disallow
Join. Select this and it will then allow you to drag the end grip away from the
wall without it automatically joining the wall.
NOTE: Please note that you have to Right
Click directly on the end grip, you wont get the same Right Click options if
you just Right Click on the wall itself.

