| Symbol | Name | Windows Alt Code | Mac Shortcut | 
|---|---|---|---|
| Ø | Diameter | Alt+0216 | ⌥+⇧+O | 
| ± | Plus / Minus | Alt+241 | ⌥+⇧+= | 
| ° | Degrees | Alt+248 | |
| ∙ | Dot | Alt+249 | |
| ³ | Cubed | Alt+252 | |
| ² | Squared | Alt+253 | |
| – | Long Dash | Alt+0150 | |
| µ | Greek mu | Alt+0181 | 
Usage
Press and hold Alt then type the numeric code using a keypad. If you
know how to do alt-codes using a ten-key-less keyboard, please reply.