When Control Panel is active Indesign is very slow, when I turn it off its almost night and day faster.
This is also happening when I open the character panel?
Please tell us what operating system (exactly) you're running. Please tell us (exactly) what InDesign version you're using. Does this happen with one file or multiple files?
Windows 10 Pro Version 1903
Indesign Version 15.1.1 x64
Happens on multiple files
I have the same issue. Trashing preferences did not resolve it.
Indesign isn't just slow - it is impossible to use for minutes at a time. If I dare to open the Control Panel (which I use all the time normally) I can forget about working for minutes. Then having closed it again - something which doesn't happen instantly - it involves a long wait. The spinning wheel of doom continues to appear even when Indesign isn't frozen, as if something 'extra' is happening in the background with every click of the mouse, even when doing something very simple e.g. selecting a frame.
This is a new installation of the latest version of CC 15.1.1 x64
On a new Windows 10 machine which was a big upgrade from my previous one, which was starting to struggle with other CC apps.
I've already disabled Font Preview.
https://community.adobe.com/t5/indesign/indesign-document-crashes-repeatedly-when-objects-are-moved/... - it looks like v15 drive crazy many users. Try to use it previous ID v14 and send samples to Adobe support.
Can you please explain what you mean by 'send samples to Adobe support' ?
Samples of what, exactly, and how do we send them?
Examples of .indd files that do your InDesign slow. Or - Are you have such behaviour on all files?
Yes - it is all files. Even newly created empty documents. But I am trying to work on two books with approaching deadlines, lots of images and plenty to do. This is now a serious problem.
Do you have Font Preview enabled? Does it help if you disable it in your preferences?