This article has 3 videos showing how to break up and put back together a multi-part image so that the alt text can be on each part separately.
1. Alignment at the bottom
Click the video for the entire process: https://www.youtube.com/watch?time_continue=1&v=SpqL5PA4zrc&feature=emb_logo
2. Alignment at the top
Click the video for the entire process: https://www.youtube.com/watch?v=IDtvpUC16tk&feature=youtu.be
3. Alignment at the center
Click the video for the entire process: https://www.youtube.com/watch?time_continue=2&v=XyBGuRrqwLM&feature=emb_logo
