The Grids are the set of lines that appear on the Workspace. To show the Guides and Grids you first have to check on the Rulers option from the View drop down menu: View > Rulers. Once the Rulers appear on the Workspace, you can drag the Guides from the Rulers. There are two types of Rulers-Horizontal and Vertical. While creating nested Timelines, Guides that can be dragged appear on the Stage, and they only show if the Timeline in which they are created is activated. To view Guides and Grids on the Stage. you have to check the Show Guides and Show Grids options.

The Grid option is available in the drop down menu of the View option and the Show Grid option is available in the sub menu of the Grid opti0n: View > Grid > Show Grid.
Similarly, the Guides option is available in the drop down menu of the View option and from the sub menu of the Guides option we can reach the Show Guides option:
View > Guides > Show Guides. You can move the guide by clicking on the ruler with the help of Selection tool. By doing this you can easily drag the guide to where you desire.

You can easily edit the Grids and the Guides. To edit a Grid. you can select the Edit Grid option: View > Grids > Edit Grids. Here. the Grid dialog box will appear. In this dialog box we will see options like Color. Show grid. Snap to grid. Snap accuracy ete. A Colors palette will appear if you click on the Color option of the Grid dialog box. You can select your desired grid color from this Colors palette. You can edit the Guides in the same way. Just go to View > Guides> Edit Guides.