Plot Quantity Duplication Tool

To access this dialog:
In the Plot Template Editor, on any plot tab, choose Custom Plot, click New Quantity, then click Duplicate for axes.

Use this dialog to add quantities for many axes at once. This can be done by duplicating the existing quantities in the plot template, or by adding new quantities to the plot template and duplicating them.

Steps before opening this dialog:

If the plot template does not already contain the quantities you wish to duplicate, then, in the Plot Quantity Selection Tool, on the Registers tab, add the desired registers from a single axis, so that they appear in the Quantities to Add to Plot Template list.
Click Duplicate for axes. The Plot Quantity Duplication Tool will open.

Using this dialog:

In the Quantities to Duplicate box, choose the quantities you wish to duplicate.
In the Axes for Quantity Duplication box, choose all the axes for which you want to add the selected quantities. Use the Select All and Clear All buttons to speed up the process if there are many axes.
Click OK to close the Plot Quantity Duplication Tool. The new quantities will now appear in the Quantities to Add to Plot Template list.