The UI in ZBrushcore 2020 will only work properly in full screen mode. There are two grey bars at the top of the screen with “ZBrushcore 2020 1.4”. I can not open certain items in the Lightbox and in the Tool menu. For example, I can not get the Subtools section to open.
This occurs on my MacBook Pro 16 inch with OS 10.15.4.