So you want to re-post an Instagram photo. Maybe it's a group shot from your college reunion published by one of your friends, or maybe it's a meme that you think your brother would love. On Twitter, you'd hit Retweet. On Facebook, you'd press Share. On Instagram, you'd tap ... nothing, because that option doesn't exist.

For its part, Instagram has deliberately resisted adding a "regram" button. As Instagram CEO Kevin Systrom put it to WIRED last year[1], "that decision is about keeping your feed focused on the people you know rather than the people you know finding other stuff for you to see." To Systrom, the exclusion of a regram option keeps the focus on "authenticity." The photos you take, post, and share on Instagram should be your own.

Of course, that hasn't stopped countless users from regramming all the time. And you know what? That's totally fine—as long as you follow some basic social media etiquette.

How to Regram

Since Instagram doesn't have a native repost feature, you'll have to use a third-party app. The most popular ones, like Repost for Instagram (free on iOS[2] and Android[3]), add a watermark to the original photo to show where it originally came from originally. You copy a link to the Instagram photo you want to repost (tap the three dots at the upper right corner of the post to copy the link) and then open the Repost app. The app adds the watermark, saves that version of the photo to your Camera Roll, then opens Instagram where the original caption is pre-loaded. You can edit the photo or change the caption there.

A word about editing: Feel free to add your own caption,...

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