Press the key
One shortcut, set once, working in every window. Whatever your hands already do is usually the right answer.
Ctrl + Spaceimages/shots/step-key.png · 1400 × 700
Settings → the hotkey row, mid-capture, with the key combination showing. Crop tight to that row and the two lines around it rather than the whole Settings window: the card is wide and short, so a full window shrinks to nothing. 1400 × 700.