Set the amount of data you can pause and view in graphs by specifying the history length.

Use these methods to set the history length for graphs that support hold and pan viewing control.

Table 45. Options for Setting the Graph History Length
Set the Default History Length

Determines the history length for your graphs in all new projects.

Go to File » Preferences and specify the history length for your graph type on the Project Defaults tab.
Set Project-Level History Length

Overrides the default graph history length for this project.

In an open project, go Project » Settings and specify the history length for your graph type.