click edit, copy the contents of the rentry [including metadata! it may seem useless, but a lot of rentries now actually rely on metadata, and if you don't copy it, it will be wonky], and then go to rentry.co [rentry's default page] to paste the content's there, after you're done filling out the info, set an edit code [dont use one from other sites, and make it difficult to guess! it's what lets you edit your rentry and access it], and set a url, both edit codes and urls can be set automatically if you click "go" without putting a url and/or edit code in
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