I would like to have a button on an opportunity page that generates and saves a pdf as an attachment object and then opens the /_ui/core/email/author/EmailAuthor
page with the attachment already attached.
I've found several good articles on saving the pdf as an attachment, such as this one from Jeff Douglas, but even though I've googled around, I haven't been able to find a parameter of the EmailAuthor page that I can assign the attachment id to.
I'm hoping I can avoid writing a visualforce page for this and would be grateful for any help.
Thanks