Working in the sketch / 2D environment of Solid Edge you can set the ‘snap’ of the cursor when clicking a line. For example an endpoint or a midpoint. The point you will snap to is show next to the cursor.
The points the cursor is sensitive to can be set with the IntelliSketch options. (Tools/IntelliSketch…) 
Sometimes the intelligence of IntelliSketch is not handy at all. Fortunately you can suppress all IntelliSketch options together by pressing ALT while sketching. Upon releasing the ALT key IntelliSketch will be reactivated.
Remark: it is possible that after releasing the ALT key the screen does not refresh itself. Just press ALT shortly again to resume sketching.
source: http://www.solid-tools.com
