To schedule a multi-photo post, click the photo icon with the plus sign (+)
You can add photos by pasting the URL in the URL box at the top, drag and drop multiple photos into the loading area, or click to upload photos.
After uploading multiple photos, you may choose to add a unique caption to be included with each of the photos. You can also click and drag the number of each photo to reorder it in the list. If you choose to remove a photo, click the red “x” on the right side. Once you are done adding photos and captions, click “Update Post” to save your multi-photo changes and to finish scheduling your post.
Note: Twitter allows up to 4 photos (without captions) in a single tweet.
Once you add multiple photos, the multiple-photo button will display the number of photos you have in that post. The pic in this example has 5 photos.
The number of photos will also show on the pending post once it’s fully scheduled.