Hi, I haven't used my Silhouette for ages and got it out today and I want to do something that I haven't actually done before, as far as I can remember.

I want to cut a design in half, so I selected knife and put the cut line in place but how do I get rid of the knife now please? I found a YouTube video and as soon as she used her knife she just selected the area she didn't want and moved it, but all I get is more cut lines. I know this is something silly but I don't want to waste hours trying to figure it out. Help please!