LSAT test prep environment capabilities

I am preparing for the LSAT. I have found a lot of valuable information! I enjoy how the things are set-up and the schedule tracker. 

WHY does kahn offer articles that present strategies that cannot be used in the Kahn environment? Articles talk about circling main points, staring background info and boxing-in evidence (as an example), of a set-up to aid in better answer selection. The Kahn environment doesn't allow for anything other then a generic one color highlighter. 

am I missing a toolbar somewhere? If no, why teach one thing and not support that teaching? this is my only critique of the Kahn LSAT prep. It is pretty significant though.