I've been customizing the drawing templates and sheet format.

The number of zones along the edges shows 2 rows (B & D)  and 2 columns  (2 & 3) for an "A" size sheet of paper.

I would like to change the number of zones to 4 rows and 4 columns

I've tried Edit Sheet and Zone Tag Editor.  I found the menu that specifies the number of rows and columns.  But when I change them it says it won't update and I don't know if it's possible and/or how.