SHAPES AND LAYERS
When you draw a vector shape in Photoshop, what you’re creating is a fill layer linked to a vector mask—this is why a shape seems to float freely from other layers, because it’s a layer in its own right. When you’ve created a shape, it remains editable as long as you don’t choose to rasterize it. You can use the Direct Selection tool to modify it, clicking and dragging on the square points that mark its corners and the halfway points of its vertices. You can apply a Layer Style to a shape, just as we did with the frame for our pop-up photo, and you can fill it with a pattern or gradient using “Gradient Overlay” in the “Layer Styles” window. The Custom Shape tool, which folds out from the Rectangle tool, means you don’t need to be constrained by the Ellipse, Rectangle, Line, or Polygon tools—you can go completely freeform. Lines with arrowheads on them are also created as Shapes— draw a line, and you’ll find an “Arrowheads” drop-down on the “Options” bar at the top of the interface. Useful if you’re drawing diagrams for use in a presentation.