Endpoints are a little-known feature of OnePager that allow you to assign special symbols to different dates in your schedule and have those symbols appear near your main task bar. Endpoints are especially useful if you have several tasks left-to-right in a timeline layout and are worried that the overlap between those tasks will mask the true start and finish dates.
Let’s start with this simple project, which is initially in a Gantt chart layout. You can see that some of the tasks are scheduled back-to-back, but that other tasks are at least partially concurrent:
