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Mint Tips

Arrows on Scrollbars in Mint
https://forums.linuxmint.com/viewtopic.php?t=222496

Change/configure 'start menu' icon
right-click icon → configure → use custom icon

LightDM Login Screen Multi-Monitor Rotation

Install arandr

sudo apt-get install arandr

Start it and save the screen state as a file.
Add the command in that file to /etc/lightdm/lightdm.conf.d/70-linuxmint.conf
i.e.

[SeatDefaults]
user-session=cinnamon
display-setup-script=xrandr --output DP-1 --primary --mode 1920x1200 --pos 1200x504 --rotate normal --output DP-2 --off --output HDMI-1 --off --output DP-2-1 --off --output DP-2-2 --mode 1920x1200 --pos 3120x0 --rotate left --output DP-2-3 --mode 1920x1200 --pos 0x0 --rotate left

Reboot system.