Hi Larry, Only found out myself through wondering why the text on my screen was much larger than normal. I will try and describe how to fix the problem in a way that the technologically challenged ( amongst whose number I count myself ) will hopefully follow. Not sure about procedure on a PC the advice below is for laptops.
If text is larger/smaller than required move the cursor/pointy thing on the screen onto the text and tap the box/pad which you put your finger on to move the cursor.
Then move your finger placing it firmly onto the left hand side (as you look at it) of the box (still staying within the box) and move your finger up and down. You should see a plus/minus sign show on the screen and the text should grow larger when you move it away from you and smaller when moved towards you.
Hope this helps