Helloo
well- It would be very practical to have a single key to switch the current tool to a previously used tool and vice versa.
Example: I am using the pencil and switch to the eraser, and with that same key I can go back to the pencil and then back to the eraser.
And it would work like that with any tool, if you are only using two tools continuously, and they are easy to switch between using a key on the graphics tablet.
In my case, the eraser and the pencil for fine details, the shape ruler and the bucket for certain elements, etc…
I don’t know if I’m explaining myself well.