Yes I have the same issue. Seems OK on my MacBook Pro with Big Sur Beta 6 (20A5364E) and Xcode V12.01, but neither Xcode V12.01 or V12.2 work on my iMac running Big Sur public Beta 9 (20A5384C).
daves1412
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Last seen
User for
Post
Replies
Boosts
Views
Activity
I cannot properly view or edit the xcdatamodeld file in XCode12.01 or XCode 12.2 in table view. There appears to be a rectangular white space overlaying the editing area at the top left of the editing area. Because you can see some lines and a bit of the '+' at the bottom of the area.