User-Defined Cells section
A work area for entering formulas in user-specific cells that can be referred to by other cells and add-on tools.
Remarks
Like the Scratch section, the User-Defined Cells section can be used by your solution in many different ways. The advantage of the User-Defined Cells section is that cells can be named—cells in the Scratch section cannot be named.
If your solution has a well-defined purpose it is suggested that you use cells in the User-Defined Cells section for clarity because User cells can be named. The Scratch section is typically used to isolate repeated complex calculations.
To add this section, use the Insert Section dialog box (with the ShapeSheet window active, click Section on the Insert menu).