Hi All, This has been a known issue. When the user uses the Pan command with the Pan button or with shortcuts, the view can have these observed anomalies (#211094). Our development is working on fixing this problem, currently it is not clear yet, why this happens, what the reasons are.
When the user zooms and pans (with the Pan command, not with the middle-click), then places an element, it is possible that the 2D-drawing process can't handle the amount of new information. From this point, the issue will resurface when/if he/she modifies or creates new elements.
On the video attached in the thread, the user middle-clicks for panning, but probably the issue had started some time before the video was created.
Workaround:
- Restart ARCHICAD and the issue will go away.
- Use only the middle-click for panning to avoid the error.
Please see the related HelpCenter troubleshooting article:
http://helpcenter.graphisoft.com/troubleshooting/performance/archicad-20-performance-troubleshooting...
best, k