Box-drawing characters to copy and paste

Born on 1980s terminals and enshrined in IBM's code page 437, box-drawing characters let plain text draw tables, panels and tree diagrams. They never left: every tree listing, TUI dashboard and README diagram still leans on them.

The set covered here is the practical core — the light lines, corners, tees and junctions that draw complete grids, the rounded arcs modern CLI tools prefer, the double-line pair for DOS-style emphasis, and the block and shade characters behind every terminal progress bar.

One rule governs them all: monospace or nothing. These characters connect edge-to-edge only when every glyph occupies an identical cell, so they align perfectly in terminals and code blocks but fall apart in proportional text.