It's difficult to tell much from your notebook. I take it you are creating the graphic using Drawing Tools. I myself never use that but prefer to write the specifications for a graphic explicitly using Show, Plot, Graphics and various primitives. This has the advantage that you have a permanent record. You can edit it and reevaluate, or copy and edit. Graphics are something of an art form and it often takes a fair amount of design and diddling to get them right. Sometimes the specifications can become rather long.

You sound like you're tying to learn some modern math and physics with the aid of Mathematica. Just what I'm doing. If you wish to contact me by email from my Profile you may.