I opened up my puter and went to yahoo mail and my font was extra large, I changed nothing how do I change it.

I tried to open my Word program and it didn't open so I shut down puter and it just came back on that way, I had to change the pixel size to be able to use yahoo mailI opened up my puter and went to yahoo mail and my font was extra large, I changed nothing how do I change it.
View menu ';text size';I opened up my puter and went to yahoo mail and my font was extra large, I changed nothing how do I change it.
NO
start-control panel-appearance and themes-display-settings-advanced....this should get you to where you want to go...