how to see which cells are read-only

[Beta]

Is there a way to quickly see which cells in a sheet are read-only, instead
of right-clicking on each cell and looking at the security tab?

 

[Dave Peterson]

I've copied an icon to my customized toolbar.

Tools|Customize|Commands tab
Format category|Lock Cell (it looks like a padlock)

I dragged this to a toolbar. Now when I click on a cell, that icon is either
engaged or not engaged--depending on the "lockedness" of that cell. (I find
this the easiest and quickest.)

If you're not using Format|conditional Formatting for anything else, you could
use that too:

Select your range and do Format|Conditional Formatting.
Then Formula is: =CELL("protect",A1)

Set a nice pattern and click ok.