What are Ctrl+Page Up and Ctrl+Page Down really doing?

[Sven]

I use these short cuts a lot as I'm sure many people do:

I also often use Ctrl+Page Up and Ctrl+Page Down alone with no SHIFT key.  This appears to go back a measure or forward a measure but I'm not quite sure what it's really doing. 

I use this to quickly go back a small amount of time before a punch in without having to rewind or use the mouse in any way so I can quickly change the project time in a predictable way.

I don't see the key combos documented.

Thanks.

 

 

[msmcleod]

The best way to find what a keyboard shortcut does, is by using the "Locate Key" button in the Keyboard Shortcuts page in preferences:

[Sven]

Thanks.