To clear the formatting associated with a form or ad hoc grid, select Clear from the Formatting group on the Planning ribbon.
Selecting the Clear option removes any Excel formatting associated with the form or grid on the Planning server. Note that you can still work with cell styles functionality since cell styles are not dependent on any custom formatting that is saved.
Related Topics:
Saving Excel Formatting on a Planning Form
Viewing Formatting in Smart View
Saving Excel Formatting From an Ad Hoc Grid
Supported Native Excel Formatting
Guidelines for Working with Native Excel Formatting and Planning Forms