noun
character path; text direction
Computing term for the direction in which characters are arranged in a line, such as left-to-right or top-to-bottom.
文字進行方向を左から右に設定する。
Set the character path to left-to-right.
このソフトは縦書きの文字進行方向に対応している。
This software supports vertical text direction.
書字方向 is a broader term for writing direction (e.g., horizontal vs. vertical), while 文字進行方向 specifically refers to the path along which individual characters are placed in a line, often used in computing contexts.
Compound of 文字 (character) + 進行 (advance, progress) + 方向 (direction). A technical term likely coined in computing to describe text layout direction.