Changing the titles in the pop up containers

Hello Diana,

Thank you for reaching out to us.

To change the title of the pop-ups, we recommend overriding the localization captions. For example:

report: {
    localization: {
      toolbar: {
        "layout_options": "Custom options",
      }
    },
    ...
 }

More label keys can be found here: https://github.com/flexmonster/pivot-localizations/blob/master/en.json

You are welcome to check the following JSFiddle for reference: https://jsfiddle.net/flexmonster/bp1cv2tu/

Please let us know if it works for you. Looking forward to hearing from you.

Kind regards,
Nadia