advice on graphics cards in Troubleshooting Posted November 30, 2017 Thanks, Jim. This is extremely helpful, especially with all of the conjecture surrounding this issue. Last question: are there any best practices for not making this issue any worse? For example, fewer viewports on sheet layers, reduce textures, wireframe vs openGL vs hidden line, sheet layer page size, viewport DPI...? I've made a habit of dimensioning as much as possible on a Dimensions design layer (in plan view) so it's one less cause for annotating a viewport on a sheet layer. Likewise I've started annotating notes and callouts either on design layers, or on top of viewports on sheet layers---basically anything to avoid editing, panning, zooming or just plain working with a viewport on a sheet layer at all. Just stabbing in the dark here but if there's anything I can do on my end to speed things up, and make life easier by working around this issue, please advise.