Fix htc icon size change

My birthday gift to my mom is an android phone and she really loves it. She is now 63 years old but despite her age, she’s still interested in using latest gadgets and mobile phones. The problem with the brand new unit I gave her is that, text and icon size are too small that she couldn’t easily see it. Can you shed some light as to how to fix HTC icon size change so we can set the desired font size and icon image size.
