Real newbie… just found Pinegrow but very impressed so far.
What I wanted to be able to do is login to a site and play around with the UI using the Visual Editor. This is easy enough for a public web page but not for a private/secure web page as I don’t seem to have the ability to actually log in to the secure site… ie. can’t actively use the site in Pinegrow.
I am not aware of a way to do what you are asking. One workaround may be to login to the secure area in your favorite browser and then save the resulting page to a folder. Afterwards you could open the saved html page in Pinegrow and make any changes necessary. Hope that helps.