If editing a ramp, you can select a uniform or full style, and edit the ramp thickness and landing thickness. If you want to change the layout (shape) of the ramp or edit properties such as the height or slope, see Editing the Layout of a Ramp.
To edit ramp properties:
Select the ramp.
Right-click and select Properties, or select Edit > Modify Elements > Properties.
In the Stairs/Ramps dialog, select the Basic tab.
If you want to change the ramp type, click on the type you want in the Type area. The first type is a ramp with uniform thickness, while the second is a full, wedge-style ramp.
If you selected the uniform ramp style, you can change its thickness by entering the desired thickness in the Ramp Thickness edit box.
To change the thickness of the landing, enter a value in the Landing Thickness edit box.
Click OK.