How to send imessages with different sizes?

[212rikanmofo]

In the keynote demo, I saw that you can send messages with certain emphasis, such as soft or something loud to get your point across. I can't figure out how it's done, can someone show me how?

 

[rmeadejr]

In the keynote demo, I saw that you can send messages with certain emphasis, such as soft or something loud to get your point across. I can't figure out how it's done, can someone show me how?

you hold down on the blue arrow facing up.

 

[212rikanmofo]

thanks for this! Can this be done on messages.app on macOS 10.12 as well?