This setting is required
This setting determines how much data to expect in the DATA sheet (this sheet is hidden from view). This setting does not need to be changed unless you were instructed to do so.
The default value for this setting is 265.
If you are pasting a value directly into the Settings sheet you should always use the Paste Values Only option to preserve the formatting of the cells. To do so, click on the cell you want to insert data, right click, select Paste Special > Values Only. Alternatively you can use the keyboard combination Ctrl+Shift+V (Command+Shift+V on Mac).