In no particular order, some of the lesser known keyboard shortcuts in Lightroom Classic.
1 - B - Add an image/ images to the target collection
2 - Shift control H - Create a new HDR file from selected images
3 - Shift Tab - remove panels from view
4 - N - takes you to survey mode for the selected images
5 - R - takes you straight to crop
6 - O changes the grid when you are in crop mode
7 - Control , - opens up Preferences
8 - L - turn the lights down! Press once and then twice and see that happens
9 - Control A - select all images
10 - Control Alt 1 - takes you to the Library Module
11 - Change to Control Alt 2 for Develop Module
12 - Control Alt 3 for Map Module
(I don't use the other modules).
13 - Right arrow key - go to the next images in the film strip
14 - Left arrow key - go to the previous image
15 - F1 - takes you straight to the Adobe Help page
16 - \ - show the filter bar. Press again to hide it.
17 - Z - zoom in and out quickly
18 - D - takes you straight to the Develop Module
19 - Control Z - takes you back a step
20 - S - expand/ collapse a stack
Check out the Alt key too, especially in the Develop Module.
Rick McEvoy Photography