Screenshots and/or screen recordings help a lot in debugging a technical issue. Please see below instructions for different systems.

Windows

• Use the Xbox Game Bar: This works on Windows 10 and later with all browsers; it only captures 1 screen at a time (the active screen). To activate it, press Alt + Windows + R. You will find the recordings in the folder Videos > Captures.
• Download & use Flameshot: https://flameshot.org/#download
• Download & use ShareX:
  • In the Microsoft app store: https://apps.microsoft.com/store/detail/sharex/9NBLGGH4Z1SP
  • From the website: https://getsharex.com/

macOS

• Use the Screenshot toolbar: To view the Screenshot toolbar, press these three keys together: Shift + Command + 5. You will see on-screen controls for recording the entire screen, recording a selected portion of the screen, or capturing a still image of your screen.
• Use QuickTime Player: Open QuickTime Player from your Applications folder, then choose File > New Screen Recording from the menu bar.
• Download & use Flameshot: https://flameshot.org/#download

Linux

• Use GNOME's screen recording tool: If your distribution uses a recent version of GNOME (like Ubuntu) or derivatives (like Cinnamon on Linux Mint), you can use this tool. You will find the recordings in the folder Videos > Screencasts.
• Download & use Flameshot: https://flameshot.org/#download
• Find some other alternative here: https://itsfoss.com/best-linux-screen-recorders/

What about mobile devices?

Screenshots and screen recordings from mobile devices are not very useful to us. They don't display all necessary information because of the screen size. Please use a laptop or computer.