Allow user to set characters per page

[jwa5426]

It would be helpful to allow the user to set the number of characters that are allowed on each page.

[lucivpav]

Can you clarify @jwa5426? Do you mean that the user would have ability to explicitly set the characters (and thus their generated rows) they want on each page?

[jwa5426]

Yes, that's exactly what I mean.

[lucivpav]

Feel free to prepare such a PR, I'd review it :)