Here’s a reference of commonly used Unicode box-drawing and arrow characters, organized by category.

Light Box Drawing

Char Name Unicode UTF-8 Bytes (hex)
─ Horizontal U+2500 E2 94 80
│ Vertical U+2502 E2 94 82
┌ Down and Right U+250C E2 94 8C
┐ Down and Left U+2510 E2 94 90
└ Up and Right U+2514 E2 94 94
┘ Up and Left U+2518 E2 94 98
├ Vertical and Right U+251C E2 94 9C
┤ Vertical and Left U+2524 E2 94 A4
┬ Down and Horizontal U+252C E2 94 AC
┴ Up and Horizontal U+2534 E2 94 B4
┼ Vertical and Horizontal U+253C E2 94 BC

Heavy Box Drawing

Char Name Unicode UTF-8 Bytes (hex)
━ Heavy Horizontal U+2501 E2 94 81
┃ Heavy Vertical U+2503 E2 94 83
┏ Heavy Down and Right U+250F E2 94 8F
┓ Heavy Down and Left U+2513 E2 94 93
┗ Heavy Up and Right U+2517 E2 94 97
┛ Heavy Up and Left U+251B E2 94 9B

Double Box Drawing

Char Name Unicode UTF-8 Bytes (hex)
═ Double Horizontal U+2550 E2 95 90
║ Double Vertical U+2551 E2 95 91
╔ Double Down and Right U+2554 E2 95 94
╗ Double Down and Left U+2557 E2 95 97
╚ Double Up and Right U+255A E2 95 9A
╝ Double Up and Left U+255D E2 95 9D
╠ Double Vertical and Right U+2560 E2 95 A0
╣ Double Vertical and Left U+2563 E2 95 A3
╦ Double Down and Horizontal U+2566 E2 95 A6
╩ Double Up and Horizontal U+2569 E2 95 A9
╬ Double Vertical and Horizontal U+256C E2 95 AC

Rounded Corners

Char Name Unicode UTF-8 Bytes (hex)
╭ Arc Down and Right U+256D E2 95 AD
╮ Arc Down and Left U+256E E2 95 AE
╯ Arc Up and Left U+256F E2 95 AF
╰ Arc Up and Right U+2570 E2 95 B0

Dashed Lines

Char Name Unicode UTF-8 Bytes (hex)
┄ Light Triple Dash Horizontal U+2504 E2 94 84
┆ Light Triple Dash Vertical U+2506 E2 94 86
┈ Light Quadruple Dash Horizontal U+2508 E2 94 88
┊ Light Quadruple Dash Vertical U+250A E2 94 8A
╌ Light Double Dash Horizontal U+254C E2 95 8C
╎ Light Double Dash Vertical U+254E E2 95 8E

Arrows

Char Name Unicode UTF-8 Bytes (hex)
← Left Arrow U+2190 E2 86 90
↑ Up Arrow U+2191 E2 86 91
→ Right Arrow U+2192 E2 86 92
↓ Down Arrow U+2193 E2 86 93
↔ Left-Right Arrow U+2194 E2 86 94
↕ Up-Down Arrow U+2195 E2 86 95
⇐ Double Left Arrow U+21D0 E2 87 90
⇒ Double Right Arrow U+21D2 E2 87 92
⇑ Double Up Arrow U+21D1 E2 87 91
⇓ Double Down Arrow U+21D3 E2 87 93

Arrowheads / Pointers

Char Name Unicode UTF-8 Bytes (hex)
▲ Black Up-Pointing Triangle U+25B2 E2 96 B2
▶ Black Right-Pointing Triangle U+25B6 E2 96 B6
▼ Black Down-Pointing Triangle U+25BC E2 96 BC
◀ Black Left-Pointing Triangle U+25C0 E2 97 80
▴ Small Up-Pointing Triangle U+25B4 E2 96 B4
▸ Small Right-Pointing Triangle U+25B8 E2 96 B8
▾ Small Down-Pointing Triangle U+25BE E2 96 BE
◂ Small Left-Pointing Triangle U+25C2 E2 97 82

UTF-8 Encoding Quick Reference

All characters above are in the Unicode range U+0800–U+FFFF, so they always encode to 3 bytes using the pattern:

1110xxxx  10xxxxxx  10xxxxxx
  byte 1    byte 2    byte 3

For example, ─ (U+2500 = 0010 0101 0000 0000 in binary):

1110 0010  10 010100  10 000000
  E2         94         80