I have always thought that I needed a massive gaming computer for good CAD graphics, but I recently moved from a large tower with gaming graphics card to a small form factor Minisforum UM773 pc that has a Ryzen 7 processor and built in Radeon graphics (32GB ram). My Solidworks 2017 software runs FANTASTIC, as does video editing software and 3D rendering software. I'm talking an order of magnitude better performance than my previous tower pc in both speed and graphics rendering. Yet, in Draftsight, which should be less resource intense than Solidworks, I get this odd behaviour of lines showing up during zoom. It is like it is momentarily magnifying a text by a thousand times. Any ideas? I looked at some other site that said go to the View-Render section and click from 2D mode and change it to "FLAT" mode. This seems to help quite a bit, but it still occasionally has minor glitches but is much less distracting. Also, when I change to FLAT, some lines in my drawing permanently disappear until I select 2D mode again. I only use draftsight for 2D, so I thought all of my lines were on the XY plane with zero depth. Apparently this is not the case. I am not at all familiar with the difference between 2D mode and Flat mode, so if someone can tell me how make everything flat, I would love it. The image in the attached video is a template I use to start all of my customer drawings, so if I can flatten this template, I think I will be fine.

I have made a video of the behaviour and uploaded it to Youtube here: https://youtu.be/gq5le8wvklQ