In i3 (and therefor sway) you can use bindsym. I don't know it off the top of my head, but it should be easy enough to find. The "-d" option with flameshot is

In i3 (and therefor sway) you can use bindsym. I don't know it off the top of my head, but it should be easy enough to find. The "-d" option with flameshot is used to have delays.