You used to be able to take rightmost part of header of name of marker, and widen it.
Then you get a horizontal scrollbar and can view full names of markers.
Seems it is narrowed enough not to get to that point to grab that header rightmost part.
Best if inspector is able to resize, but at least fix width or something with list of markers and header.
You have to open Markers in separate dialog now - Inspector not so usable.