I just downloaded the latest Rhino 8 evaluation and noticed a display but in the “Macro library” panel when I click on certain elements from the list. The field at the bottom is unable to display the content properly. Here is an example:
I use Windows 10 with 200% scaling at a 4K screen resolution. If I expand the width of the panel to the right side, the content is fully visible then, but in my opinion that slider should not cover the lower half of the field.