flip uv map without numpad I try to flip a uv map in uv editor mode. I read that S, X, -1 should do the trick but I don't have a numpad and it doesn't work even with the emulate numpad option switched on.

Any idea?
Select the UV island/islands you want to flip, press Shift+S-->Cursor to Selected. Change the Pivot type to Bounding Box Center. Then go to UVs-->Mirror-->X axis.