angle pointer only shown for a few hardcoded entities
ECLASS_ANGLE is only used on info_player*, path_corner, team_ctf, misc_teleporter_dest: https://github.com/TTimo/GtkRadiant/blob/master/radiant/eclass_def.cpp#L251
For Quake 1, it would be useful to have the angle arrow/pointer in the 2d and 3d views for other entities, most importantly monster_*, but also func_door and probably others.
I could make a PR for adding those specific cases. However, would it make more sense to show the angle pointer for all entities except a few excluded ones like func_detail, func_group,...? You can always turn off the angle arrows in the View menu if they're annoying.
How about make it so all fixed sized entities show the arrow? Would that be an acceptable change?
How about an arrow for entities with angle key and fixed size? https://github.com/TTimo/GtkRadiant/pull/319
It is probably better to be able to define a type for each key/value in the entities.def file.
change is merged, the various entities.def will need to be updated to use the feature