As she dragged a “Process” shape onto the canvas, she noticed it clicked softly into alignment with the grid. That was Snap . Then, when she drew a connector line from its edge to another shape, the line stuck —that was Glue . She remembered a tip: Never manually draw lines. Use the Connector tool (Ctrl+3) and let Visio glue them. If you move a shape, the line moves with it. Her diagram stayed pristine.