When you use a hotkey to open a panel, a small HUD notification appears briefly that says the name of the panel. It would be useful if this happened when you switch between tools with hotkeys as well, especially in fullscreen mode where the toolbar is not visible. That way you could easily tell which tool you are switching to without having to verify it by going out of full screen and looking at the toolbar.
I also noticed that a HUD notification does appear when you switch the drawing mode with a hotkey (I cycle between freehand and line a lot), but it always says "freehand" instead of saying the mode you are switching to, like "Line." Perhaps a minor bug there, it would be nice if it said the name of the specific mode you are switching to.
