Terrain brush hotkeys for changing size, opacity etc only work when in Paint Texture mode, they do not work in paint detail mesh or tree brush modes.
Is this expected behaviour? It’s slowing down my world-building greatly. Using Terrain Tools 3.0.1, I have reported this on the documentation page using the problem report button there.
I would love to have shortcut for this too, the tree brush size/brush radius shortcut has been missing from unity built-in terrain for a long time, I would love to see them in unity shortcut manager.