Place cursor in bib record where diacritic will be entered.

From the tool bar menu, select "Edit" and "Special Character Entry" OR hit Ctrl + E. This will display the Special Character Entry box. You may need to scroll down to find the correct diacritic.

Highlight the diacritic to be inserted. Click on the "Insert/Close" box. This will insert the diacritic and return to the bib record.

Double-check the diacritic in the bib record to see if the correct diacritic was inserted. Some look very similar when they are displayed in the Special Character Entry box.

Repeat the steps as necessary to insert additional diacritics.