View menu with the mouse or by selecting Alt and V at the same time.  Select the Text Size option with the mouse or select Z . Increase or decrease the text size with the mouse or by using the up and down arrow keys and selecting Enter . in Firefox versions earlier than 1.5 open the View menu with the mouse or by selecting A lt and V at the same time. Select the Text Size option with the mouse or by selecting S twice.  Increase or decrease the text size with the mouse or by using the up and down arrow keys and selecting Enter . In Netscape click on the View menu with the mouse or select Alt + V .  Click on the Text Zoom option with the mouse or select Z . Click on the text size you want with the mouse or use the up and down keys and then Enter to select the text size you want. In Opera press + (in some versions you might need to select the Shift key as well) to increase size and the - (minus) to decrease text size. Each click will increase or decrease the size by 10%. Alternatively select Alt + V to bring up the view menu and then select Z to bring up the zoom options then use the up and down arrow keys to select the option you want followed by Enter . In Mac this is done in different browsers by: