Common Data
Paper Types
Under System-> Settings -> Common Data -> Paper Type you can add paper type name, width and high you can add as many paper types as you want, edit and delete the unnecessary once

Encodings
Under System-> Settings -> Common Data -> Encoding you can add an Encoding name and code, you can add as many Encodings as you want, edit and delete the unnecessary once

Languages
Under System-> Settings -> Common Data -> Languages you can add a Language name and code, you can add as many Languages as you want, edit and delete the unnecessary once

Currencies
Under System-> Settings -> Common Data -> Currencies you can add a currency name and code, you can add as many currencies as you want, edit and delete the unnecessary once