You can raise or lower a photo board using the Elevate tool on the right-click menu.
To raise or lower a photo board:
Select the photo board.
Right-click and select Elevate, or select Edit > Modify Elements > Elevate. The value in the Elevate dialog is the current elevation of the photo board.
In the Elevate dialog, specify the desired elevation of the photo board above the terrain.
Click OK.
Tip: You can also change a photo board’s elevation by changing the Distance above current location or terrain variable on the photo board’s Behavior property page.