Ctrl + = increase text or page size
Ctrl - = decrease text or page size
Ctrl 0 = reset text or page size
Tab = next link item
Shift + Tab = previous link item
Alt left arrow = backward
Alt right arrow = forward
Arrow buttons = scroll page
You can zoom in on any menu, block of text or single image by double-tapping the area you need to focus on. Expand to the whole page by double-tapping again.