also: りょうたんそろえ
noun
full justification; justified alignment
Printing term for aligning text to both left and right margins. The reading りょうたんぞろえ is standard; りょうたんそろえ is a variant.
この文書は両端揃えで印刷してください。
Please print this document with full justification.
両端
When you use full justification, the line lengths become uniform.