Good luck getting spell check to work. And yes I followed all the very confusing steps. It works for one document, but not the next one you're working on.

@Microplastics101 That's not very helpful feedback, Steve 😕 Millions of people use Impress so it clearly is "functional". Why not help the volunteers who give you a free office suite, with specific feedback (LibreOffice version, operating system, document format, what you're trying to do, what you can't do etc.) Otherwise we can't make any improvements with such curt and vague "feedback"...

@Microplastics101 No hard feelings 😉 But let's find out what's happening. LibreOffice isn't perfect but it shouldn't be crashing like that. What version, on what operating system? In what format is the presentation (eg .odp)?