Favourites: the star on a mod marks it; the profile menu's Add to favourites does the same for a profile.
Edit name, author and version… (the mod's menu) changes how one profile shows a mod; Use the mod's own goes back.
Update channel: a mod from GitHub, CurseForge or Modrinth can follow a different release channel; Pin this version stops its updates.
Disabling a mod: when other enabled mods need it, Mortar offers to disable those too.
Report to author… (the mod's menu) opens a prefilled report for a Thunderstore, CurseForge or Vintage Story mod.