OK --- this worked --- however, I ran into some glitches along the way which took a while to figure out, my not being an expert in the Score part of Logic.
I figured I'd document what happened for the next person!
First of all, my score consists of multiple tracks, as I mentioned in the initial post. When I dropped the multi-bar rest symbol, I dropped it into the TOP staff. When I then double-clicked on the rest symbol, instead of getting the expected dialog to adjust the length of the rest (per the manual), it just replaced contents of the multi-track score with the single staff....I could not figure out how to get back to the multi-staff score so I had to keep going back to the main track window and regenerating a score view from selected tracks. (There must be a better way!)
Anyhow, I eventually discovered that if I dropped the multi-bar rest symbol into the BOTTOM staff, then double-clicking did indeed bring up the dialog where I could set the length to auto at which point everything worked just as I expected.
Many thanks for pointing me in the right direction.
(P.S. for your original comment, I originally clicked on "Helpful Answer" and then I discovered that I could not change it to "Correct Answer". If you know how I can change it, that would be great)
You can find the pdf's here (click on the 'view asPDF' link, or control click and "Save As").
Re disappearing staffs, sounds like you need to check out the "Hierarchy" button ( also know as the 'Leave Folder' and 'up a level' button). See p 97 of your new pdf :-)
You could also move up a level by 2x clicking in the background of the editor.
Cool --- thank you, I will look at that "Hierarchy" button ---- as I said, I'm not deeply familiar with the score stuff in Logic --- I just want to create some simple scores to publish into my iPad music display app and wanted to get rid of a lot of wasted space.
(I really don't like this new discussions system --- yet again, I clicked on the wrong button --- marking your response about PDFs the correct answer to the question about rests. Is there any way to change these?)