in the manual
here is what is said about the "selecting sharp edges" command:
This tool selects all edges between two faces forming an angle greater than the angle value, Where an increasing angle selects sharper edges.
Ok, but what's the angle value then?
I tried to play with the angle value in the data tab of the properties editor (with autosmooth on), but it doesn't seem to affect my selection, so what is it? is it a fixed value internally coded?