Box Drawings Up Single and Left Double

Box Drawings Up Single and Left Double at U+255B forms a corner junction where a single vertical line continues upward and a double horizontal line extends to the left. It is a printable symbol in the Box Drawing block, designed for constructing text-mode frames, tables, and interface borders from aligned line segments. Its most recognizable use is in terminal and console layouts, especially older DOS, bulletin board systems, setup screens, and text user interfaces that draw windows without graphics. In a boxed panel, this character typically appears at the lower-right end of a mixed-style border: the bottom edge uses a double rule, while the right side uses a single rule rising above it. It is also used in plain-text diagrams, monospaced documentation, and retro-styled interfaces where authors want crisp grid lines that survive as text. Because it mixes single and double strokes, it is most useful when separating areas with different visual weights, such as a double-lined footer meeting a single-lined side divider.