Someone tell me how to change hotkeys in the Pie menu itself? The idea is to work only with right hand, not to reach for us and not to take hand off the mouse. That is, reassign numbers or replace them with letters. Thank you in advance!
There is no such functionality in Blender currently. You can just keep the hotkey that called the menu down and drag the mouse in the direction of the option you want to chose and then release the hotkey. Or you could set the Confirm Threshold to something that is convenient to you in the preferences:
Most pie menus now have a letter underlined in each option. If you press the key to call the menu, then press the underlined letter, the option will be selected without using the mouse.
However, as you can see in the screenshot below, "Only locations" doesn't have an underlined letter. This may just be a bug.