In moments like that, it’s hard to keep from crying, you know?
Extracting forms from photographs can be a daunting task if you’re not familiar with the full potential of Adobe Photoshop. Some forms can take a long time to pull out, perhaps even hours. Doing this with the selection tools can seem almost unreasonable, even with undo and history, because you spend so much time creating one selection shape. If you mess up that shape, you can’t undo just the part you messed up on; the whole shape counts as one move, so you either undo the whole thing or move on.
There are several ways around these initially confusing dilemmas, but I’m going to skip that for now and move on to a much more effective way of extracting forms: Shape Layers. Shape layers are a much better tool to use when extracting forms, for the single reason that they make use of the pen tools and vector shapes.