3 Correct answers
I've had the unreasonably slow text editing problem strike me before, and usually clearing preferences fixes it for me. In two cases I can bring to mind, this was caused by working in clients' files that were fairly well mistreated (e.g. lots of crashes in the document history). In any case, when you have Weird Stuff like this, clearing out your prefs first is a pretty typical first step in troubleshooting.
...Using ctrl-alt-del immediately after starting InDesign has not brought up the option
Yes, I finally managed to delete the preferences and this appears to have made a difference. At least highlighting text/words/lines/paragraphs happens quickly again. Hopefully, it will stay this way.
Thanks for pointing out my errors, because I clearly didn't pay full attention to the instructions. In the end the shift-ctrl-alt worked for me on the 20th attempt.
This is clearly something that has happened before and happened to other users. It took me 47 magazines to encounter this particular issu
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Robert, Joel, and Rishabh - Thank you for your suggestions. I tried Rishabh's suggestion saving as IDML, opening and resaving as INDD. This worked! Thank you! This also creduced the file size from 33MB to 21MB with no loss of data or issues that I can see. Love to know why this worked. Maybe Adobe can add this to the next update and improve their INDD save process?
By @mgsummer
You are probably only using Save, right?
When you work on your document - InDesign is constantly adding Undo Hi
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Replies
Try remove the font folder in package it will work, it worked for me.
By @morsy74
This will mean that you've fonts duplicated - installed in the System and / or in Adobe's own folder and / or in the Fonts subfolder.
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