I'm rigging a fancy coat, and part of the shoulder mesh is hidden by a giant lapel. I hid it for Edit mode (selected the mesh to be hidden and hit H), but that didn't seem to hide it in Weight Paint mode also. A 4-yr-old answer on Reddit says I can use face or vertex masking to hide this part of the mesh; where did it go in v2.90, or how can I hide parts of a mesh while still being able to weight-paint freely across the visible mesh? Thanks!
EDIT: The tooltip for the little box and "point on box" icons in the upper left say those are face and vertex mask selection for painting. That will indeed hide the lapel (which is roughly the height of the distance between the shoulder and pelvis bones), but it doesn't seem like I'm able to edit beyond a specified range, which doesn't entirely help.