Send only updated part of data to the screen on display function

[SL-RU]

The library works great! Thank you!

But it will be perfect, if display function display not all buffer again, but only that part, which was updated.
Is it possible?

[BLavery]

No I wasn't intending to do that. This is a tiny display (not many pixels), and it's only 1 bit/pixel of data being sent. The whole screen update is quite fast already, at least for my requirements. Feel free to improve it if you feel it's slow for you.
Brian