Nearly a year after it was announced, Instagram says it's delivering the ability to rearrange the posts in your profile grid. It had been available to some people in test groups, but as of June 8th, it's rolling out widely via the Android and iPhone mobile apps.
Until now, the posts on your Instagram profile have been locked in chronological order beyond the ability to pin three posts at the top, but once the feature is live on your account, you can long-press and drag posts freely, no matter how old they are. Any posts that are pinned will remain at the top.
Instagram boss Adam Mosseri a …
DW News 
