Hi there and welcome
This is always done via the program you are printing from within, this tells the printer what to print. It is not done on the actual printer.
Can you tell me please, which program are you using to type in, and I can tell you how to do this.
In word, to change the font, click on the number (by default is 11) and change it to a larger or smaller number to alter font size.
Also to the left of it you can change the font style (default usually Arial)
This film shows you how to do this
The printer will then print it out like this
If you have any problems, or would like any additional information or assistance, please do not hesitate to let me know.
Else if you can take a second to rate my service by clicking one of the stars at the top of the screen then submit, that would be greatly appreciated.