it should be an emoji that people will use frequently, often, and that a large number of people will use. Two, it has to be in that sweet spot of being specific enough to warrant a separate image ...

Kick off with a big emoji sticker: just drag an emoji into your ... it appears in the blue bubble at the same size as the ...

When you're done, tap outside of the emoji window. The options will include Small Grid, Medium Grid, Large Grid, Rings, and Spiral. This will determine how your chosen emoji populates your background.