まど表示 ひょうじ いき変換 へんかんじゃありませんでした
ma dohyōji iki hen kanja arimasendeshita

Noun
Desu Copula

The polite, past negative form of 窓表示域変換

1. Was not a window display area conversion.; Was not the window display area conversion.

Past/Perfective
Negative
Polite
Terminal Form
Computing