User talk:Σ/TI

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The purpose of this page is to teach one how to type a literal sigma character using a keyboard.

  • Remember, you can always copy and paste a sigma like you would with any other string. I still do not mind being called Sigma.
  • Σ, Σ, or Σ can be used to display a sigma. These entities can also be used in the search box.

Input methods[edit]

Different types of computers can produce the Sigma symbol with different key combinations.


Alt code[edit]

If you are reading this on a Windozer, you may be able to use an alt code to type non-Latin symbols. Using the numberpad, hit Alt+228 and release.

That may have produced a different character. If so, your system has been configured to use code page that is not 437, probably for a different language or region.

You can change the code page by changing the 'format' option (the dropdown box) under the 'Formats' tab at 'Control Panel' -> 'Region and Language'. There are alternatives to changing the code page, though.

Unicode input method platform[edit]

It may be worth noting that this is only the configuration I use. Other input methods may support `u.
This works on Windows 7.
  1. Go to 'Control Panel' -> 'Region and Language'.
  2. On the 'Keyboards and Languages' tab, press the 'Change Keyboards' button.
  3. A new window should have appeared. Press the 'Add' button.
  4. You should now see a list of languages with their countries. Under 'Chinese (Traditional, Taiwan)' check the box labeled 'Chinese (Traditional) - New Phonetic', and then OK.
  5. Select the field that says 'Chinese (Traditional, Taiwan)', and then press 'Properties'.
  6. Under the 'Advanced' tab, there should be a table mapping property names to your setting. Change the 'Leading key' field to the backtick (`) and then OK.
  7. Now, in the window that was opened in step 2, go to the 'Advanced Key Settings' tab. Change the key sequence for 'Chinese (Traditional) IME - Ime/NonIme Toggle' to Ctrl+Space.
  8. Save the changes. Logout and back in if nothing happened.
  9. Open your favourite text editor, hit Ctrl+Space, and type `u03a3, a space, and then hit ↵ Enter. A sigma should have appeared at the caret position.
  10. You can switch out of this input method by hitting Ctrl+Space again.



There are two common methods for direct input of Unicode characters. These methods will not work with SCIM installed.

  • Hold Ctrl+⇧ Shift and type u followed by 03a3. Then release Ctrl + Shift.
  • Enter Ctrl+⇧ Shift+u, then type 03a3, and press ↵ Enter or Space.


Installing SCIM will remove the capability described above. There is a package, scim-rawcode, that imitates that feature. You can set Ctrl+⇧ Shift+u to be the shortcut for switching to the rawcode input method. After switching to rawcode, you can type 03a3, and press ↵ Enter or Space.


On Classic Mac and OSX systems, option-w produces sigma.