is it possible to click on the label and change what is written on it? If it is how can I do it?
I dont think it is possibile with a label because there are no blocks about actions on it ! But, as workaround, you can substitute a button to the label. Just “dress” it with same background color and text color of the label, remove 3d appearance …et voila’!! 
I already did it even if i feel stomacated everytime by this workaround …but since no way better this way!
thanks 
if it works for you put SOLVED…
Yes it is possible, use when label clicked.
thank you very much 