I know you can select multiple frames. It’s the moving of them as a single unit rather than individually, e.g., Composer and Lyricist frames to be moved up or down retaining their vertical relationship rather than trying to calculate it or shift them to where one might imagine it is correct at sight.
OK. I have been able to move them. My problem was that I was trying to use the mouse for the job rather than keystrokes. Albeit, with a large score the response is slow and I was too impatient. Solved.