Radial profiles of the midplane temperature T(r) (top) and aspect ratio h(r) (bottom) in an equilibrium disk when passive heating is taken into account (black curve), viscous heating is added (red curve), and the opacity of Bell & Lin (1994) is used instead of that of Flock et al. (2019) (blue curve). One can see that viscous heating increases h(r). In combination with opacity transitions, viscous heating generates bumps in h(r).