The Save Draft feature Instagram began testing last month is officially being rolled out to iOS and Android users.
The Facebook-owned photo- and video-sharing network announced the update via tweet, with a link to this Help Center page:
Trying to create a post that's just right" With the latest update, you can save as a draft & come back to it later. https://t.co/7lZ0eyNtBC
— Instagram (@instagram) September 20, 2016

The Help Center page offered the following instructions for using the new feature:

Tap the camera button at the bottom of the screen, then take or upload a photo or video. Add effects, filters, a caption or your location.
Go back to the filtering and editing step, then tap the back arrow in the top left.
Select Save Draft at the bottom of the screen.

Note: If you don’t edit the post, tag people or add a caption or location, you won’t be able to save the post as a draft.
To see posts you’ve saved as a draft, tap the camera button and then tap Library. Posts will appear at the bottom of the screen below Drafts.
Instagram users: Happy"

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