MyBB Community Forums

This is my Forum text size: http://gyazo.com/5dfaac0a894436e792df3ed087684a3f

But i need the size to be like this: http://gyazo.com/b7272de71338dda773718f4ecfd4aac6

How can i change the global forum text size?

it depends on your theme . if you want to change the text size in posts then try adding .post_content {font-size:16px;} in global.css

Got it. Thanks