How do I add special characters to a text box?

Position the cursor.

Position the cursor.
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Position your cursor where you want to insert the special character or diacritical mark.

Click the Insert Special Characters icon.

Click the Insert Special Characters icon.
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This displays the Select Special Character box.

Select the special character or diacritical mark you want to insert.

Select the special character or diacritical mark you want to insert.
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This displays the special character / diacritical mark in the text box.