description of Expression Editor for Test field of a bind-if component

This screenshot displays the Expression Editor that can be invoked from the Property Inspector to set the Test expression for a bind-if component. The editor contains a Variables pane for selecting variables available in the component's current context, and an editor pane that displays the expression will be used for the Test expression. Selecting an item in the Vairables pane adds it to the editor pane. You edit the expression in the editor pane to define the conditions for the variables that will be evaluated.

The Expression Editor contains a Save button and Cancel button. Clicking the Save button saves the expression in the component's Test field and closes the Expression Editor.