Sure!
first of all. I forgot to write i have a MAC OSx 10.12.3
Assume i have a canvas with a histogram and i forgot to insert the axis label.
So i click on the x axis with the right button of the mouse and i select SetName.
If i want to type a greek letter i need the # symbol, but i am not able to type it in the window that appears ( and i cannot paste something as well)