Once a single pen plotting analog data on the Historical Data Viewer page has had its scale range shifted or has had its y-axis zoomed in or out, you can reset the pen on the graph.
1. Select the analog pen that you wish to reset in the pen legend (i.e. a selected pen is one with a rectangle displayed around it in the pen legend).
2. Click the Reset Y-axis (Analogs Only) button.
The selected analog pen's data will be reset on the graph. All other analog pens that have been shifted or zoomed in or out on will remain shifted or zoomed.
The section that follows provides instructions on resetting the data for all analog pens on the graph.