How do you do that?

Use an external website, post link, or get Brick-Hill + and do this:

!
(image link)

Use a site like prnt.sc

get brick hill plus


Chrome: https://chrome.google.com/webstore/detail/brick-hill%20/hendnmfbkcgmpafikljbfhpgphdilohj?hl=en
Firefox: https://addons.mozilla.org/en-US/firefox/addon/brick-hill/