I am extremely new to Blender. I've been working on making a tree with Sapling for a few hours and I'm starting to collect a number of bars that I can't hide. I drag the re-size bar over and I've click and dragged the corner, but I can't hide these bars. I guess I can't add an attachment but I've got a ton of bars on the side and several on the bottom. Is there a hotkey to hide them or am I just doing this wrong?[/img]

Start with a UI tutorial, like this: http://en.wikibooks.org/wiki/Blender_3D:_Noob_to_Pro/Blender_Windowing_System_New