Top of Text Cut Off in Dialogs

I have a new iMac 21.5" running MacOS 10.13.6. Why is the top of the text cut off in dialogs?

Try to disable OpenGL. In the menu Tools>Options>LibreOffice>View.

See also:

https://www.libreoffice.org/download/release-notes/

https://wiki.documentfoundation.org/OpenGL

I resolved this by disabling a font that I’d installed (Sackers Heavy).