Follow these steps to increase or decrease the size of the text for the web page you are viewing:
- Open the ' View ' menu with the mouse or by press ' Alt ' + ' V '.
- Click ' Text Size ' or press ' Z '.
- Click on ' Increase ' or ' Decrease' to change the text size or press the right arrow to expand the ' Text Size' menu options and use the up and down arrow to select ' Increase ' or ' Decrease' and then press ' Enter '.
- Alternatively you can press ' Ctrl ' + ' + ' (plus) to increase the text size, ' Ctrl ' + ' - ' (minus) to decrease the text size. ' Ctrl ' + ' 0 ' returns you to the default size.

Fig 1
Follow these steps to set a minimum text size for all pages you visit:
- Open the ' Edit ' menu with the mouse or press ' Alt '+' E' .
- Click on ' Preferences', or press ' N '.
- Make sure that the ' Content ' tab is selected - if not use the arrow keys until it is highlighted (in Blue) as shown in Fig 2.

Fig 2
- In the Fonts & Colours box click on ' Advanced ' , or press ' Alt ' + ' D ' , to open the ' Fonts ' dialog box (Fig 3 ).

Fig 3
- Click on ' Minimum font size ' box or press ' Alt '+' O ' to highlight. Use the up and down arrows to select a new font size.
- Next you need to uncheck the checkbox 'Allow pages to choose their own fonts, instead of my selections above ' by clicking on it or by pressing ' Alt ' + ' A '
- Click the ' OK ' button or tab to ' OK ' and press ' Enter ' to return to ' Preferences '.
- Click the ' Close ' button or pressTab ' until ' Close ' is highlighted and press ' Enter ' to return to Firefox.
Note: If this does not work it could be because your computer settings cannot be changed due to local IT policies - contact your local IT support for further help.