Add an expression snippet

Getting to this window

Choose Tools > Expression Snippets Manager.
To create a snippet, click Add; or to change a snippet, select it and click Modify.

Name	Description
Name	Enter the snippet's name; this appears in the Functions pane of the Expression Editor.
Description	The description is optional, and can be used to give a bit more information about your snippet and its intended use.
Author	The author name is optional.
Expression	The expression you constructed is displayed. To create or edit the expression, click Build.