labels not showing on left side of screen?

On my laptop when I am deleting (red) or saving (yellow) on the left side of the screen it shows how many are in each category.  Then when I click on the delete box...that's what's deleted.  On my desktop, I went through a folder of 500 images...deleted what I did not want but could not see a panel on the left side showing unlabeled ...favorites or deletes.  Where is this and why are the two screens different.  Both have been updated