You can
use
the
dialog box to specify a formula for a component property.
Category
Displays the available categories of functions that you can use in the formula.
Select
Displays the list of functions from the selected category. The functions are listed
alphabetically, so you can scroll through to select the appropriate one. Click
Add to insert the function into the
Expression field at the insertion point. By default, the
function is appended to the end of the existing expression.
Expression
Displays the formula to use.