I've been using a 2010 iMac with Adobe Dreamweaver for last four years. Six months ago, I migrated to Adobe Cloud where I used Dreamweaver. Everything was fine using the Cloud version. One month ago, I purchased a new iMac with Raster Display. From that moment on, as I scroll in the document window, the document flashes horribly. Almost unusable. Even if you don't scroll and you try to click hold and drag a line of text, the text disappears. If I stop scrolling, I can see the Local Files Window flutter.
If I drag the document window to my other monitor that is not raster, just a HDMI screen, there is zero problem.
I've googled and haven't found anyone else with the same problem.
Any suggestions?