It is possible to increase/decrease the rotation angle of an object using the scroll wheel of your mouse when hovering over the belonging input field (in steps of 1 degree).
With 'Ctrl' pressed, the increment/decrement is 0.1 degree, which is already very helpful.
Question: Is there a way to get an even finer increment/decrement of 0.01 degrees?
(I often have to align scanned images, where finer rotation steps would prove useful)