Changing Fedora's GRUB Menu's Resolution

After installing Fedora on a laptop with a 2256 x 1504 resolution screen, the GRUB boot menu screen became too small to read.  To change the resolution, I needed to edit /etc/default/grub and replace the GRUB_TERMINAL_VALUE and add GRUB_GFXMODE with the desired resolution:

#GRUB_TERMINAL_OUTPUT="console"
GRUB_TERMINAL_OUTPUT="gfxterm"
GRUB_GFXMODE=800x600

Then commit the changes to GRUB with:

> sudo grub2-mkconfig -o /boot/grub2/grub.cfg