Gradients allow you to create the illusiuon of depth and allows you to blend colors.
Grid
When the grid is displayed in a document, it appears as a set of lines behind the artwork in all scenes. You can snap objects to the grid, and you can modify the grid size and grid line colour.
Guide
Guides are a feature in Flash to help you lay out the Stagemore precisely. Guides are horizontal and vertical lines you can use as drawing aids while you work.