How can I make the font bigger?

Hello, the font for the menu, sub menu, body, and titles of the pages are too small, and I was wondering how I could make the font bigger?

 

Hello,

Paste the code given below in Custom CSS section
(Appearance -> Theme Options -> Styling Options -> Custom CSS) of your dashboard.

Code:

 #menu li a {
font-size: 15px;
}
#menu .ddsmoothmenu li li a {
font-size: 14px;
}
p {
font-size: 14px;
}
h1.page_title {
font-size: 25px;
}

You can change the value of "font-size" as per your requirement.
This will solve your issue.