Use a smaller font size in Discord settings if available on your device
Zoom out with Ctrl + Minus on Windows or Cmd + Minus on Mac
Reset zoom with Ctrl + 0 on Windows or Cmd + 0 on Mac
Lower your system display scaling in your device settings
Enable compact mode in Discord appearance settings
Use markdown formatting for smaller-looking text, such as `||spoiler||` for hidden text or code blocks for a different appearance