This module is now redundant. Access can be removed in Setup/ User permissions
The Chart gives a graphical representation of the schedule
The type of activity displayed can be set using the Milestones, Orders and Actions checkboxes
The type of time bar displayed can be set using the Target, Not Started, Started and Completed checkboxes
A row height number box lets you set the height of each row (doubled if you are displaying both Target and Actual dates), whilst a Links checkbox hides or shows connecting lines
The horizontal timescale can be moved using the arrows at each end of the scale, whilst the slider between them sets the scale. If you alter the scale, a key 
will appear. Pressing this key will save this date range as your default
If the time scale width is less than 60 days, a series of dots appears at the bottom representing workdays and holidays. Clicking these dots toggles their status.
The chart can be printed by pressing the top right print button which loads a printer dialog box
