The pane undockable option is no longer available after update 4.20.

For the title, I had 2 monitor screens, and I used to put the Content Pane on the secondary screen, set it to undockable and maximize the window.
After updating to version 4.20, I found no undockable options.
Comments
https://www.daz3d.com/forums/discussion/comment/7113146/#Comment_7113146
https://www.daz3d.com/forums/discussion/comment/7113186/#Comment_7113186
Are both screens using the same resolution? How are they set up in other respects?