Increase the font size "by 2 pixels" or "to 2 pixels"? [closed]
If your font size is 10px and you need to make it 12px, say "Increase the font size by 2 pixels".
If your font size is smaller than 2px and you need to make it 2px (unlikely, but not impossible), say "Increase the font size to 2 pixels".
Note that in both cases you need pixels (plural), not pixel (singular).