# To review the 12da road definition

Select the road in the map and tap the Edit softkey to review the geometric elements that define the horizontal and vertical alignments.

1. In the map, tap the road.

2. Tap Review.

   Black hollow circles represent any portion of the horizontal alignment that has no elevations and so is drawn on the ground plane.

   To move the ground plane closer to the road, tap and select Settings and then edit the ground plane elevation.

3. Tap a string or a station on a string.

   Alternatively, tap the String softkey to select a string from the list. When a string is selected, tap the Station softkey to select a station from the list.

   Information about the selected item is shown alongside the map.

4. To select a different station, you can:
   - Tap the station on a string.
   - Tap the Station softkey to select a station from a list.
   - Press the up or down arrow key to select another station.
   - Tap the Sta‑ or Sta+ softkey.

   Use the map toolbar to navigate around the map and to change between views.

5. To view available cross sections, tap . Alternatively, assign the Toggle Plan / Cross section function to a function key on the controller so that you can switch between the plan and cross section views when reviewing and staking a road.For more information, see Favorite screens and functions.

   To view the cross section at a different station, you can:

   - Press the up or down arrow key.
   - Tap Station to key in a station or to select a station from the list.
6. To return to the plan of the road, tap or press the Tab key.
7. To view an automated 3D drive through of the road:
   1. When viewing the plan or cross section in the map, tap 3D drive.
   2. Tap to start the drive through.
   3. To pause the drive through and inspect a particular part of the road, tap . To orbit the road while the drive through is paused, tap the screen and swipe in the direction to orbit.
   4. To move forward and back along the road, press the up and down arrow keys.
   5. To exit 3D drive, tap Close.
8. To exit the road review, tap Close.