I’m basically asking what type of project you are working on, 4k, HD, SD. It is possible your box and drives are just under performing for the project.
If your Avid project is 30i NTSC 4:3, than you are pretty much using the lightest weight project type available. When you jump to Marquee, you would basically be working from the same project type automatically.
I’m assuming your are using a video background from your timeline in Marquee?
When back in Avid, your project has no issues with playback?
How long of a title are you trying to build? Is it struggling with a 2 second title, or are you trying to put a title over top of a 3 minute piece? Start small and work you way out to see where your bottleneck is.
To be fair, i am not a Marquee user…probably haven’t opened it for 4 years, but these types of issues usually go hand in hand with project type, or storage type/speed, or computer power.
Glenn