Dualboot: set boot time?

hi there,
i installed endless os while running win 10.
now i got the boot loader, grub, and can choose endless or windows, which is great.
but the timer to boot any of the systems without entering is set to 30 seconds. i want it to be like lets say 3 secons. how can i change that?

thanks in advance

You can edit the timeout in C:\endless\grub\grub.cfg. The directory C:\endless\grub is hidden, and deliberately has very restrictive access control settings since incorrectly modifying or deleting files in here will stop your computer booting.