In most web browsers you can press the keys “Ctrl” (Command on a Mac) and “+” simultaneously to increase the text size in your browser. To make the text smaller you can use “Ctrl” (Command on a Mac) and “-”. Alternatively, if you have a mouse with a scroll wheel, you can hold "Ctrl" while scrolling the mouse wheel up or down to adjust the text size in the window you are viewing. Also, you can typically adjust font/text size by selecting the “View” option from the file or settings menu in your browser and looking for the “Text Size” or “Zoom” sub-menu items.