Font style and size

[#1]

Have just bought a new lap top and haven't been able to put Mozilla Firefox on to it (which has been the email I have been using on my desk top).  Happy to use the PlusNet site even though I don't find it as easy to use.  Probably my fault as I find it harder, as I get older, to adapt!  I find the font size difficult to read and want to change it.  Have looked around PlusNet site but can't find this information.
Thanks in advance for your help. 

[#2]

If you are referring to PlusNet Webmail, then the font size will be controlled by the web browser. I believe, usually, ctrl & plus key (+) will increase the page's font size.

[#3]

Thanks. I knew someone would help me.  Not being very computer literate I only ever know one way of doing anything and that is not necessarily the quickest or best but just me 'bumbling' around until some works.
Thanks