Connect Instagram to your social networks
To adjust your settings with third-party services such as Facebook & Twitter, just follow these steps:
1. Tap the Profile tab.
2. Tap "Edit sharing settings".
3. From there you can select a third-party service in order to log in and connect. If you want to edit your connection, tap on the service to change your information. If you want to remove your connection to an account you've already connected with, tap the green check mark to unlink.
Now, every time you take a photo on Instagram, you'll have the option to toggle sharing on or off in the Sharing section for the third-party services you've connected to before you post your photo to Instagram.