Android Police was the first to report on the update, describing how the feature works:
While in a chat, tap the photo icon in the bottom control row. You’ll see the now-standard horizontal photo reel. Slide left or right to find the one you want, then select either the “Aa” (text) or pen icon. You can doodle or type to your heart’s content, which should be very handy for elaborating on complex driving directions. Or drawing genitals on the heads of your friends when they’ve been caught in a compromising position. You know, important stuff. When you’re done, switch down to the bottom bar again and tap the arrow icon to upload the photo.
Android Police also pointed out that the feature does not currently work with photos taken via Messenger’s built-in camera.
The Google Play page for Messenger only had this to say under its “What’s New” section:
More fun with photos: Now you can draw and type messages on photos you send from your gallery.
Readers: What do you think of this new Messenger feature?
Screenshot courtesy of Android Police.