If I understand you correctly, you are arguing about the font size in the virtual terminals (VT), accessible with
CTRL + ALT + F[1-6]!?
These terminals are configured during the boot process. Depending on your version of Grub you can configure the setup to your preferred solution:
Using GRUB1 (0.9) open the file
/boot/grub/menu.lst and search for lines that start with
kernel /boot/... and add or change
vga=xxx. A table with possible values and it's meanings can be found on wikipedia. So your kernel line should look like this:
kernel /boot/vmlinuz root=/dev/sda1 ro vga=791
Please take care not to change anything else, otherwise your machine may not boot probably anymore!
If you have installed GRUB2 (1.9) the
vga parameter became deprecated. Open
/etc/default/grub and set the following values:
You can choose between one of these resolutions:
To generate a new config file run the following as root/sudo:
grub-mkconfig -o /boot/grub/grub.cfg
In some curious cases this might not work for you, you can instead also use the deprecated
vga version. Add the
vga= setting next to the
GRUB_CMDLINE_LINUX_DEFAULT= line in your
/etc/default/grub, so that this line eg looks like:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash vga=791"
In both cases, GRUB1 or GRUB2 you need to reboot to see the effect of your changes.