How do you make a horizontal grid line in Revit?

You can create horizontal grid lines in Revit using the Grid tool.

1. Access the Grid Tool: Go to the View tab and select Grid.
2. Set Grid Orientation: In the Options Bar, click the Grid Orientation drop-down and choose Horizontal.
3. Create Grid Line: Click on the desired location in your project to place the horizontal grid line.
4. Adjust Grid Spacing: You can adjust the spacing between grid lines by modifying the Grid Spacing value in the Options Bar.

Note: If you need to create a vertical grid line, simply choose Vertical from the Grid Orientation drop-down.

You can also create grid lines using the Reference Planes tool. This option allows you to create more complex grid arrangements, including curved grids.