Choose the caption bubble to begin. If you want to upload a custom bubble or alternative image then submit the caption first, then edit the comment and attach a "Place img". Once the image is approved you can use it by editing the caption again.
Maybe for when he's getting streamed but he has got like the worst config for live spectating ever :D He's got no crosshair hit indication and impressives/excellents disabled. You have no idea whats going on :D