FYI: The Reaper terminology for"Region" in Protools is "Item".
Try this Script, i use it all the time for what you want:
https://www.dropbox.com/s/kg48sufw9u...Items.eel?dl=0
Howto import this script into you Reaper Action List:
- Place the downloaded script in your Reaper resources folder > Scripts folder.
- Open Reaper Action List
- Click on the button "Reascript: > " Load" (bottom left of the Action List Window)
- Choose the script, click "Open"
Now, the script is added to your Reaper Action List and you can assign a custom keyshortcut to it.
Hope this helps !
Warm Regards.