also: うえそろえ
noun
top alignment
In printing and typesetting, aligning text or elements along their top edges.
この段組は上揃えでレイアウトされています。
This column is laid out with top alignment.
Compound of 上 (うえ, 'top') and 揃え (ぞろえ, 'alignment'), from the verb 揃える (そろえる, 'to align').