How can I add a B-Seam in MeasureSquare Mobile for iPad?
This article applies
to MeasureSquare Mobile App for iPad Build 2.9.6  and newer.
Step 2: Tap on "B-Seams".
Step 3: Swipe your finger on the screen to snap to a wall then drag your finger across to complete the B-Seam. 
Step 4: Once the B-Seam is applied it will divide the floor area allowing the seam to be adjusted independently. 
