TODO update keyframe status screenshot.
The "Timebar" is the area above the Time Track Panel, the Graphs Panel and optionally at the bottom of the Canvas Window. It indicates time as a frame ruler and you click and drag within it to scrub your timeline.
You can adjust the Time of the keyframe by drag and drop or the Length of the keyframe by holding key when releasing the mouse button. During a keyframe drag and drop operation a tooltip indicator is displayed indicating time informations.
Right click over a keyframe in the "Timebar" open the keyframe contextual menu.