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  • Hi again, I’m just coming back to this once more!

    I realised I’m not 100% which field I should be updating.

    I have a Radio Button (size) that is an option on image attachments.
    I also have a Gallery field that holds those images.

    I’d like the images to take the default value (med) when they are uploaded or a page with a gallery is published (as the gallery might contain images that don’t have a value set by the user yet)

    Do I use the update_field() function on the gallery field or the radio button?

    I hope that makes sense…