The following illustration shows a daily schedule in Chart view. Point to the illustration to display text that defines the chart elements.

Summary bar: Summarizes the tasks below it, and extends from the earliest start date (where the first triangle in the summary bar appears) to the latest finish date (where the last triangle appears). If a phase has tasks, the summary bar appears in the phase row to summarize the tasks. If a task has subtasks, the summary bar appears in the task row to summarize the subtasks.
To reschedule a phase and all of its tasks (or a task and all of its subtasks), click the summary bar and drag it to the left or right until it spans your desired set of dates. This changes the earliest start date and latest finish date in that phase and keeps the same duration. And all the tasks move with the change of the phase.
Taskbar: Shows the length and scheduled dates for a task. To change the duration of a task, resize the taskbar: click the taskbar, and then drag its left edge to schedule a different start date or drag its right edge to schedule a different finish date.
To reschedule a task without changing the duration, drag the taskbar to a different date in the chart.
Taskbar with percent done: If you enter a % Done amount in the Task Data view, a progress bar in the taskbar indicates the amount of the task completed.
Red vertical line: Indicates today's date.
Milestone: Indicates a task with a zero duration. Milestones mark an event that must be reflected in your project plan, such as the approval of a design or an assembly line startup. You can drag the left edge of a milestone icon to stretch it into a taskbar. The milestone becomes a task with a start and finish date.