A quick way to “unhide” multiple Rows or Columns within an Excel sheet is to select all the cells and then double click between any Rows or Columns and BAM!
You have all the Rows and Columns visible once again.
Helpful Resource:
John Michaloudis is a former accountant and finance analyst at General Electric, a Microsoft MVP since 2020, an Amazon #1 bestselling author of 4 Microsoft Excel books and teacher of Microsoft Excel & Office over at his flagship Academy Online Course.
30 Days - Full Access 
