This section depicts the time estimate of a task by displaying it with limited width.
The timeline shows the whole month,
Toolboxes
At the right side of the screen, you will find a toolbox that gives access to choosing which users should be shown on the timeline.
As seen above, the toolboxes will appear once you move the cursor across one of their icons, and disappear again when you move the cursor away from the boxes. Read on for more on these.