Customise your display Display controls are provided in the top right-hand corner of every page (excluding some specialist science pages). Clicking each image will set your default view for every page on our web site. (NB. Requires Javascript and Cookies to be enabled.) Default text size Default font size Larger text size Larger font size. High contrast page High contrast, yellow text on a black background. Making text larger in your browser See the following instructions on how to increase the size of the text on any web page you are viewing. In Internet Explorer: * Open the ' View ' menu with the mouse or by pressing ' Alt ' + ' V ' . * Select the ' Text Size ' option with the mouse or by pressing ' X ' . * Choose your preferred text size with the mouse or by using the up and down arrow keys and pressing ' Enter ' or by clicking on it. In Mozilla Firefox: * Open the ' View ' menu with the mouse or by pressing ' Alt ' and ' V ' at the same time. * Select the ' Text Size ' option (v2), ' Zoom ' (v3) with the mouse or by pressing ' S ' twice. * Increase or decrease the text size with the mouse or by using the up and down arrow keys and pressing ' Enter '. * Alternatively you can press ' Ctrl ' and ' + ' to increase the text size, ' Ctrl ' and ' - ' to decrease the text size. ' Ctrl ' and ' 0 ' returns you to the default size. In other browsers, see their Help