Press space to type what you want it to print. All keys on a normal keyboard will work. It even knows the difference between capital and lowercase letters. You can then tell it where to print it, what size you want the text to have, and where to stop the text. (The spot where it will go to a new line) Also, if you type ^% or &) you can get the dog emojis.
You can use this in your own projects as long as you give me credit for this part of it. Just drag the sprite into your backpack. (The sprite, not the custom block, because you will also need all the costumes) The second custom block is to make sure the TTS says the emojis correctly. If you don't want the TTS you can delete the second custom block and the two blocks at the end of the first custom block.