Unicode characters for special keys on the Mac keyboard (not necessarily Mac specific). #symbols

mac-keys-unicode.md

⌘ – ⌘ – ⌘ – the Command Key symbol
⌥ – ⌥ – ⌥ – the Option Key symbol
⇧ – ⇧ – ⇧ – the Shift Key symbol
⌃ – ⌃ – ⌃ – the Control Key symbol
⎋ – ⎋ – ⎋ – the ESC Key symbol
⇪ – ⇪ – ⇪ – the Capslock symbol
⏎ – ⏎ – ⏎ – the Return symbol
⌫ – ⌫ – ⌫ – the Delete / Backspace symbol
⇥ – ⇥ – ⇥ – the Tab Key symbol

Courtesy The Apple Logo in Unicode; Command, Option, & Shift Symbols in Unicode; and Special Key Symbols. The last one is ultra-complete.

Extended list:

Symbol	Command	Unicode name	HTML Entity
⌘	Command	Place of interest	⌘
⇧	Shift	Upwards white arrow	⇧
⌥	Option	Option key	⌥
⌃	Control	Up arrowhead	⌃
🌐 / fn	Globe / fn	Globe with meridians	🌐
⏎	Return	Return symbol	⏎
⌤	Enter	Up arrowhead between two horizontal bars	⌤
⌫	Delete	Erase to left	⌫
⌦	Forward delete	Erase to right	⌦
⌧	Clear	Clear	⌧
⇥	Tab	Rightwards arrow to bar	⇥ ⇥
⇤	Backtab	Leftwards arrow to bar	⇤ ⇤
␣	Space	Open box	␣ ␣
⎋	Escape	Broken circle with northwest arrow	⎋
⇪	Caps lock	Upwards arrow from bar	⇪
⏏	Eject	Eject symbol	⏏
⇞	Page up	Upwards arrow with double stroke	⇞
⇟	Page down	Downwards arrow with double stroke	⇟
↖	Home	Northwest arrow	↖ ↖
↘	End	Southeast arrow	↘ ↘
←	Left	Leftwards arrow	← ←
→	Right	Rightwards arrow	→ →
↑	Up	Upwards arrow	↑ ↑
↓	Down	Downwards arrow	↓ ↓

Additionally, there's another Enter key symbol: ⌅ (a "projective"). It's very similar to ⌤ (an "up arrowhead between two horizontal bars"), but it was also used to symbolize a column break.

The projective was used more commonly on Macintosh keyboards to symbolize the Enter key, and the up arrowhead between two bars was more in software menus.

Function keys (approximated):

F1:
F2: ☼ (☼)
F3:
F4: 🔍︎
F5: 🎙
F6: ☾
F7: ⏪︎
F8: ⏯︎
F9: ⏩︎
F10: 🔈︎
F11: 🔉︎
F12: 🔊︎

The F1 and F2 keys can be more correctly signified with the 🔅 and 🔆 characters, respectively.

Also, F5 has a better alternative instead of 🎙️: 🎤. In my character viewer, 🎙 is labeled as "studio microphone," while 🎤 is labeled as just "microphone." There's also the 🎤︎ character, which looks exactly like the F5 key on my Mac, and, just like how @noah-nuebling commented earlier on the 🌐︎ symbol actually being the same as 🌐, 🎤︎ is the same as 🎤.