The Drawing Stage is where you build your documents. Drag shapes from the symbol libraries or create elements using the toolbar to create flowcharts, diagrams, schematics, wireframes, floor plans, or whatever else you desire.
The bottom and side scroll bars help you move around in larger documents. Holding down the spacebar while you click and drag lets you pan around the canvas. And, if you have a mouse with a scroll wheel, you can use that, too!