How do i get the faunt letters to be bigger on my computer, it,s so small i can,t hardley see it. What dio i do to get my letters bigger?

A simple fix for most systems is hold control key and select + to zoom in or - to zoom out.

Well, for Windows, right click on your desktop, select properties. Then click on the "Settings" Tab. You can adjust the screen resolution. Or, there should be another tab right next to the settings called "Appearance", and at the bottom, it should have a drop down menu that lets you select a Font Size.

I don't know which OS are you using?if its Windows Xp then try the below statements:
Click right on your Desktop->select properties->you wil get a property window
in that window select Appearance tab->you wil find a Font-size drop down menu-->then  select the corresponding font -size which ever you feel comfortable...and if you are using Linux then follow the below steps:
Open terminal
Change font by clicking--> settings, font
Save font by clicking --> settings, save as default