I am going along with the book PhotoshopCC Missing manual by Lesa Snider. I need help in tool picker selections on left side of screen. I am unable to turn a tool off (deselect) after selecting one. I have searched this site, Adobe site, general web search with no luck. Have tried using Esc, double clicking on tool button, right clicking on tool button. Nothing works for me. If some one could steer me to directions or tell me I will certainly appreciate it. Computer is PC with 8.1. My end goal is to put dimensions on photo and use them I place of a drawing for installation instructions . Thank You, Larry