The Character Map program (CHARMAP.EXE) is supplied with all versions of Windows. Both diacritical characters and symbols can be entered using the Character Map:
To use the Character Map program:
From the Windows Start > Programs menu, select Accessories, then System Tools, then Character Map.
Select the Symbol font, if necessary. (Other fonts will revert to the Typing Display Font when pasted in EndNote.)
Double-click the character(s) you need.
Click the Copy button to copy the characters to the Clipboard.
Return to EndNote, position the cursor in a reference, then select Paste from the Edit menu to paste the characters.
Or, with both your EndNote reference open and Character Map open, you can click on a character in Character Map and then drag-and-drop it into your EndNote reference.
Note: The Character Map may include some Unicode characters that will not work in your selected font. If you insert a character that is not recognized, it will appear in EndNote as a box.