Search Inputs - Outpus
In the following model, you want to know which variables are output variables and which are input ones.
You can choose where to search for variables: the active sheet, a range in the active sheet or all sheets in the active book.
Click on Format Cells button.
To undo the changes, do not close the dialog and click Undo (blue arrow button.) Please take into account that the Undo function is available only if you are working with the Current Sheet and Selected Area options. If you have selected All Sheets, you may not use Undo. and your active book will keep the formats set.