In the Monitoring → Graphs section any custom graph that has been configured can be displayed.
To display a graph, select the host group, host and then the graph from the dropdowns to the right.
Time period selector
The filter section above the graph contains a time period selector. It allows you to select the desired time period easily.
The slider within the selector can be dragged back and forth, as well as resized, effectively changing the time period displayed. Links on the left hand side allow to choose some often-used predefined periods (above the slider area) and move them back and forth in time (below the slider area). The dates on the right hand side actually work as links, popping up a calendar and allowing to set a specific start/end time.
The fixed/dynamic link in the lower right hand corner has the following effects:
Another way of controlling the displayed time is to highlight an area in the graph with the left mouse button. The graph will zoom into the highlighted area once you release the left mouse button.
Three control buttons are available in the title bar: