Text size

On Chrome? Word? Wordpress? Something else?

assuming you mean here, click "Open BBCode Editor" (small green text above Reply box).

highlight the text you want to change, and then click the Normal button.

it will give you four other text size options --

Tiny
Small
Large
Huge

If using IE, there's a little gear looking icon in the upper right. You will find an option to change text size across the internet.

If you haven't gotten a useful answer so far, you will need to make your question a bit more specific.

If you are viewing Internet through a browser and want a magnified view of the screen with (pc-clones), there's a quick alternative in addition to what has been mentioned:

press CTRL and + (plus sign) to enlarge
press Ctrl and - (minus) to shrink.

It enlarges the text and the everything on the screen.