You can change the colors of the characters, the background, and the size of the characters to match the content of your post.
Arrange it how you would like, according to how you are feeling at the time or the content of the post.
■Settings (For iOS and Android)
1. Tap the icon on the bottom right of the timeline or profile screen
2. A form for posting will appear, so tap the “Aa” icon
You can select from 15 colors for the characters and the background.
You can make the characters larger by long-pressing the “Send” button.