In need of assistance please XD

Okay, I checked the memories but I'm not even sure what to look for so I just decided to bite the bullet and post the issue.

My friend is having a problem with his Line tool and I have no idea how to help. He just wants to make a line which is understandable if he's using the Line tool but he keeps getting 
shape. All his setting are identical to mine so it should work, but it doesn't :/

So, does anyone have any advice as to what is wrong? Any help is much appreciated.

Thanks in advance.