Turn OFF the new crop ratio previews

A new "feature" happened in a recent auto-update…It's really obtrusive.  I know what aspect ratio I need and don't need to see this.  How do I make it stop?

By @KE_DP

OK, there are multiple mis-interpretations and overreactions going on in that question. It’s not new, and it’s fast and easy to change.

The Aspect Ratios guides have been there for a long time, one of the many Crop Guide Overlay choices that have been in Lightroom Classic for years.

If you don’t like the current Crop Guide Overlay, there are multiple quick ways to change it. You can choose a different one from the Tools > Crop Guide Overlay submenu, as shown in the picture below. 

And the picture shows us a major clue as to how this might have gone wrong, even if you don’t remember ever opening that submenu. The single-key shortcut for Cycle Grid Overlay is the O key (circled in red in the picture), so if at some point you pressed the O key while the Crop tool was active (such as an accidental key press), this would cause the Crop Guide Overlay to cycle to the next one. So the other traditional way to get out of this is to keep pressing the O key until you like the overlay you see.

Edit: Rob_Cullen’s post reminded me that maybe you didn’t want to see any overlay at all. In that case, you can press the H single-key shortcut he mentioned, which is a shortcut for the command Tools > Tool Overlay > Never Show. You can also control that in the Tool Overlay menu that you can see in the toolbar at the bottom left corner of the picture. If you can’t see that toolbar, then you want to make the toolbar visible (View > Show Toolbar, or its single-key shortcut T).