Discrete Charts
Discrete Charts are the standard way of looking at the historical value of an discrete channel in a dashboard panel.
It provides a horizontal bar-graph showing different colours for the various values the discrete value went through during the dashboards time-frame.
Interactions
With The Bars
Hover your mouse over a segment of the bar to see the value, start time, end time and duration.
Left-click on an piece of the bar to open the navigation menu for that channel. One of the options will be Zoom In On Time to zoom in to that specific time-frame.
Right-click on the line to open the editing menu for that channel, which is used for moving the channel to different panels.