Symbols used to represent functions
by Porges
I was looking for some standard symbols to represent the Control key and the Alt key, and couldn’t find one until I came across ISO/IEC 9995-7. 
Because I had much trouble finding a free copy of the document on the ’Net, I have made a table of the symbols and their functions below. I have marked those not present in Unicode as �.
Some examples: copy is usually [⎈ + C] and close is usually [⎇ + F4].
| Symbol | Meaning/Summary |
|---|---|
| ⇧ | Select level 2 (AKA Shift) |
| ⇫ | Lock level 2 (AKA Shift-Lock) |
| ⇬ | Caps lock |
| ⇭ | Num lock |
| ⇮ | Select level 3 |
| ⇯ | Lock level 3 |
| ⇨ | Group select |
| ⇰ | Group lock |
| ␣ | Space |
| ⍽ | No-break space |
| ⎀ | Insert |
| ⎁ | Underline (continuous) |
| ⎂ | Underline (discontinuous) |
| ⎃ | Emphasize |
| ⎄ | Compose characters |
| ⎅ | Center |
| ⌫ | Delete backwards |
| ␥ | Delete |
| ⎚ | Clear screen |
| ⇳ | Scrolling (I assume this means Scroll lock) |
| � | Help |
| ⎙ | Print Screen |
| ⏎ | Return |
| ⎆ | Enter |
| ⎇ | Alternate (Alt key) |
| ⎈ | Control (Ctrl key) |
| ⎉ | Pause |
| ⎊ | Break/Interrupt |
| ⎋ | Escape |
| ⎌ | Undo |
| ↑ | Cursor up |
| ↓ | Cursor down |
| ← | Cursor left |
| → | Cursor right |
| ↟ | Fast cursor up |
| ↡ | Fast cursor down |
| ↞ | Fast cursor left |
| ↠ | Fast cursor right |
| ⇱ | Home (Beginning) |
| ⇲ | End |
| ⎗ | Previous page |
| ⎘ | Next page |
| ⇤ | Tab left |
| ⇥ | Tab right |
| � | Line up |
| � | Line down |
| � | Backspace |
| � | Partial line up |
| � | Partial line down |
| � | Partial space left |
| � | Partial space right |
| � | Set margin left |
| � | Set margin right |
| � | Release margin left |
| � | Release margin right |
| � | Release both margins |
| + | Addition |
| − | Subtraction |
| × | Multiplication |
| ÷ | Division |
| = | Equals |
| ⎖ | Decimal separator |