To do this, select the second Axes object in the "Plot Browser" pane. This should be the top-right pane in the Plot Browser window.
Here, click on the text that indicates 'Axes 2' or the name of the secondary axes whose limits you would like to modify interactively. Once this is in focus, select the "Y Axis" tab in the bottom pane. The "Y Limits" text boxes should allow for interactive modification now.
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