I havd been using my computer this morning with no problem sending emails. Now suddenly anything I type in an email is coming out so tiny I can hardly read it no matter what font I choose.

What happened and how do I fix it?
Thanks

I havd been using my computer this morning with no problem sending emails. Now suddenly anything I type in an email is coming out so tiny I can hardly read it no matter what font I choose.

What happened and how do I fix it?
Thanks
Managed to fix it in the mail format "options' menu