This document discusses filling and stroking paths in Photoshop. It explains that paths created with the pen tool are not visible until filled or stroked. To fill a path, select it and click the Fill Path button, then choose a color or layer. You can also specify options like opacity, blending mode, and anti-aliasing. To stroke a path, select it and click the Stroke Path button, then choose a brush and tool settings to create a painted border along the path. Both filling and stroking paths in Photoshop allow you to apply colors and effects within user-defined vector shapes.