Grub Customizer alternative?

I have read in several places that Grub Customizer is a no-no in Manjaro. I have installed Cinnamon and need to edit the grub menu entries. Is there an alternative to Grub Customizer? If not could someone point me to instructions for doing it manually, please?

it’s no magic. you edit /etc/default/grub with sudo rights and after editing simply use “sudo update-grub” in a terminal, reboot and that’s it.
i usually use this 2 commands after editing

sudo update-grub
sudo mkinitcpio -P

you can get further information about grub and configuring with this link:
https://wiki.archlinux.org/title/GRUB

Better in this order:
sudo mkinitcpio -P
sudo update-grub

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Little hope by:

No risc, no fun…

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You could try “efibootmgr” in a terminal.

It is generally not a good idea for an inexperienced user to edit system configuration files. Unless of course it is a testing machine, for educational purposes. Using a “rescue stick” or an other linux installation with a dedicated tool like grub customizer installed, is a much better solution IMHO.