[laurentb]

I don't know if Unity does it but I think I remember Adobe and 3D programs like Maya and 3DS Max also have this "hidden slider" feature which you can also control the increments with a combination of the shift or ctrl key (don't remember which one)

[Ayesh]

Also with the scroll wheel. In Lightroom, this mouse wheel slider feature saves a ton of keyboard/mouse switching time.

[laurentb]

Yeah I think that's a remnant from the days where mouses used to have 3 buttons rather than a wheel