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Changing the X Axis on a Trend Chart

Procedure

Create or select an active trend chart.
By default, the X-axis displays on the bottom of your chart as Time.
Select the tag you want to use to replace Time on the X-axis and click on the down-arrow of the tag to display a drop-down menu.
From the drop-down menu, click Use as X-Axis.
The tag becomes the X-axis in the chart and an Undo icon appears in the top right corner of the chart.
Click the Undo icon.
The new tag is removed from the X-axis and returned to the Y-axis. Also, the X-axis reverts back to a time-based axis.