How do I remove this?

I have added a picture below of what I am talking about. How do I remove the "ghost" too box that pops up when I use the Element Selection Tool? It pops up every time I select and element and don't move. It is especially annoying when I need to lengthen a line to a specific length and I click on the end and I can’t time in the length under the Accudraw. Please help. Thanks