You can make stickers in a few ways:
Snap a pic in the moment or import a photo from your gallery (learn how to do both in the previous article)
Select “Create Sticker”
Then tap the yellow arrow icon to dump it
Pro-Tip: you can select “Retake” to return to the first step
The sticker you post to the Wall will be saved to “My Stickers” in the next step
To react to anything, just tap on the element
Once you bring up the reaction sheet, tap “Stickers”
Choose from the stickers in the sheet or tap “Create Sticker” to add a new one