Show all cells

[texteditor]

Is it possible to "Show all cells in a worksheet" I have a worksheet received from someone that is supposed to help with a problem but many columns and rows are hidden, also the alpha numeric cell labels so I am having great difficulty following the logic.
Thanks, texteditor.

[royUK]

Columns & Rows are possibly hidden. Select all cells by clicking between the Row & Column headers, then Format & Unhide.

Tools-> Options -> View & check Row & Column Headers