The reader of my university lecture regularly posts lecture notes online. The pdf contains handwritten mathematical theorems including the proofs. Everything is written on a completely white background.
I want to create a new printable file containing the theorems and comments only (no proofs) as exam preparation
Is there an easy tool able to accomplish this on a Mac running High Sierra? It may be a bit tricky to get the breaks in pages right. The workflow would ideally look like this:
Use rectangular selection tool to highlight proof. Hit some key to delete selected area/fill the rectangle white. Select everything below the proof and move it upwards until no whitespace is left.