I'm not sure how, but some setting has changed in my Solidworks. I used to be able to freely drag a line around after I sketched it. Now, when I draw, say, a vertical line, I can only move it horizontally. It's like the end-points are fixed in the y-direction. If i click on the endpoints, I can move the line around (but the other endpoint will stay in the same y-position. How do I fix this so that I can click/drag a line around anywhere I want?