I have installed knoppix in my other computer, it seems to work fine. I have bad eyes. the stuf is so small I can't read it. I can not fide any way to make things larger.
Open Terminal. It can be accessed from the "Launch" menu in most Linux distributions.
Type "xrandr" and press "Enter." A list of possible screen resolutions is printed on the screen.Type "xrandr -s resolution" and press "Enter." Replace "resolution" with a resolution displayed in the list in the previous step. For example, type "xrandr -s 1280x1024" and press "Enter." The screen resolution is now changed to the inputted value.