Microsoft Visio - Extended Timelines
Extended timelines are useful for getting a magnified view of the finer aspects of a period of time. For example, the extended timeline might show many details of events from a particular time period, which might not be visible on the main timeline.
To create an extended timeline, drag the Extended Timeline shape onto the main timeline. This opens the familiar Configure Timeline dialog box where you can specify start and end dates. Since this is an expanded timeline, you can choose a lower scale such as weeks instead of months if you have a busy schedule for the week.
The extended timeline is connected to the main timeline by means of two dotted connectors with yellow ends.The yellow ends can be used to move or change the orientation of the expanded timeline. You can also add milestone events to the expanded timeline. However, any event or interval added to the extended timeline will not appear in the main timeline.
Extended timelines can also be added in addition to the existing developed timelines.