The settings available differ from browser to browser, but most browsers offer some or all of the following:
Change the font size - you can adjust the size of nearly all the text on this website by using the font size setting in your browser. This setting is found in the 'View' menu of most browsers.
Other text and colour changes - some browsers allow you to change the default font and background colours you use. These settings are usually found in the 'Options' or 'Preferences' menus
Use a 'plain' layout - many browsers allow you to strip a web page of all layout and styling by turning off the website 'style sheets'. If your browser supports this setting you will most likely find it in the 'View' menu.
Most browsers let you skip from link to link using the tab key. The current link will be highlighted with a blue dashed line. To move backwards, hold down shift and press the tab key.