In the classic graph widget, you can display a single custom graph or simple graph.
To configure, select Graph (classic) as type:

In addition to the parameters that are common for all widgets, you may set the following specific options:
| Source | Select graph type: Graph - custom graph Simple graph - simple graph | 
| Graph | Select the custom graph to display. This option is available if 'Graph' is selected as Source. | 
| Item | Select the item to display in a simple graph. This option is available if 'Simple graph' is selected as Source. | 
| Show legend | Unmark this checkbox to hide the legend on the graph (marked by default). | 
| Enable host selection | Set graph to display different data depending on the selected host. | 
Information displayed by the classic graph widget can be downloaded as .png image using the widget menu:

A screenshot of the widget will be saved to the Downloads folder.