How Do I Add the Use of the Dyalog Unicode IME in Windows?

You cannot type APL Characters after installing the Unicode IME.

Enable Different Input Methods For Each App Window

Open Start → Settings and search for Advanced keyboard settings.

Enable the following options:

• Let me set a different input method for each app window
• Use the desktop language bar when available

The desktop language bar displays the Dyalog “D” icon when the Unicode IME is active.

If the IME Still Cannot Be Activated

Check the registry key:

HKEY_CURRENT_USER\Keyboard Layout\Preload

Add a new String Value with a name that is one more than any currently existing keys.

Example:

String Value named 3 whose value is e0990809. This asks Windows to preload the UK Dyalog Unicode IME.

Values for using IME with other regional layouts:

e0990406  (DK)
e0990409  (US)
e099040C  (FR)
e099041D  (SE)

Restart Windows after making registry changes.

Example IME Usage

• Ctrl + I → ⍳
• Ctrl + R → ⍴

Windows Enterprise / Restricted Profiles

Some managed Windows environments restrict access to Advanced keyboard settings. If you cannot modify keyboard settings or registry keys, contact your system administrator.

Summary

Enabling different input methods or updating the preload registry entry resolves most cases.