Since you are using Mac Os 10.5 in
Help Menu > Search,
type; grid
and select Grid Options > Grid and Background.
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For window users it is under
Menu View > Grid Options
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The background color is not part of the WE it is part of the Template.
Eduardo Rolón AIA NCARB
AC27 US/INT -> AC08Macbook Pro M1 Max 64GB ram, OS X 10.XX latest
another Moderator