Right click on yer desktop. Click Properties, then the Settings tab and adjust the Screen resolution slider to suit your preference. On my monitor, I use the 1024 x 768 pixels setting, but you may find a higher setting more useful.
With yer preference for big fonts these days, I guess yer aul' eyesight's must be shot tae fuck, ya blun cook. Either that or you've just been promoted to master annoying c**t.