Use this procedure to create a slab or roof slab component, or to edit existing components in a slab or roof slab style.
You can also add components to a style by pasting in components you have copied from other styles of the same type.
Tip: Only the first 20 components of a slab or roof slab style are controlled by the display system. It is suggested that you limit the number of components to 20, since any additional components would be controlled by material assignment only.
- Open a tool palette that has a slab or roof slab tool, right-click the tool, and click Slab Styles or Roof Slab Styles. Note: Alternatively, you can select a slab or roof slab in the drawing, and click Slab Styles or Roof Slab Styles from the Edit Style drop-down on the General panel of ribbon’s contextual menu.
- Select the style that you want to change.
- Click the Components tab.
- To add a new component, click
. If no existing component was selected, the new component is assigned an Index number of 2, but otherwise has the same values as the first component in the list. If an existing component was selected, the new component is a duplicate of the selected component, except that its Index number is 1 higher. In either case, you can edit the properties of the new component as described in the following steps.
- To edit the name of a selected component, click in the Name column, and enter a new name.
- To specify the thickness of a component, double-click its Thickness value, and then do one of the following:
If you want to … Then … specify a fixed thickness that cannot be edited when you add or edit objects of this style enter a new value for Thickness. specify a variable thickness based on a Base Thickness (BT) value that can be determined when you add or edit objects of this style click 
to display text boxes that let you specify a formula that defines how the Base Thickness variable is used to calculate component thickness. - To specify the offset distance between the component and the slab or roof slab baseline, double-click the Thickness Offset value for the component, and then do one of the following:
If you want to … Then … move the component up or down by a specified increment click 
or 
in the lower-left corner of the Components tab to offset the component by the Offset Increment value that you specify. The selected component is highlighted in green in the viewer. let the software calculate the offset select Auto Calculate Thickness Offset. specify a fixed offset enter a value for Thickness Offset. specify a variable offset that is calculated from values that you specify click in the Thickness Offset column to display text boxes that let you specify a formula that defines how the Base Thickness variable is used to calculate component thickness. - Repeat steps 5 through 8 to add more components to the style.
- To change the order of components in the style, select a component, and click or at the upper-right side of the tab to move the component to the desired position relative to the other components.
The Index numbers update to reflect the new order.
- Click OK.