Short answer: Use your device’s built-in shortcut.
Windows 10
- 🖼️ Win + PrtScn (laptops: Fn + Win + PrtScn) → saves to Pictures/Screenshots (full screen).
- 📋 Ctrl + PrtScn → open Paint → Ctrl + V → save.
macOS
- 🖥️ Shift + Cmd + 3 = full screen.
- ✂️ Shift + Cmd + 4 = selection (press Space to capture a window).
- 🎛️ Shift + Cmd + 5 = toolbar (options/recording).
iPhone
- 📱 Side + Volume Up (with Home button: Home + Side/Top).
Android (incl. Samsung)
- 🤖 Power + Volume Down (with physical Home: Power + Home).
💡 Tip: Crop or blur sensitive info before sharing.