Shortcut - operate on selected files

Is there a way (eg. modifier) to make DO shortcuts operate on selected files rather than chckboxed ones in checkbox mode?

Shortcuts as in keyboard shortcuts?

You could try adding commands which set the checkboxes to the selection. Other than that, or moving the commands into a context menu, I don't think there is a generlal way (only specifics for a few special commands).

This is what I'm trying to do.
I have a keyboard shortcut Ctrl+Q that does:

@dirsonly Go OPENINDUAL NEWTAB=findexisting PATH {filepath$}
Eg. I'm in checkbox-mode and am checkboxing some folders to copy, but before checkboxing a folder I want to see what's inside it. So I'd like to open selected folder, not all checkboxed folders. Currently this command would open in dual view in tabs all checkboxed folders. I want to open only the selected one.

Put the command into the All Folders context menu and you can run it from there on selected files while in checkbox mode.