To identify the events to display on the timeline, you specify the data source — property or data page — for the events. At run time, the list is automatically refreshed with new items whenever the property or data page value changes.
In the Source field on the General tab of the Properties panel, specify the data source for the control:
Set the Visibility option to determine when the timeline is displayed.
Select Always to display the timeline unconditionally.
Select Condition (expression) to make the visibility dependent on an expression. In the field that is displayed, select a condition or click the Open condition builder icon to open the Condition Builder.
Select Condition (when rule) to make the visibility dependent on a when condition rule. Click the Open icon to create a when condition or review an existing one.
If you selected an expression or a When rule, select the Reserve space when hidden check box to reserve space on the screen when the timeline is hidden.
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