Dotted circle
The dotted circle, in Unicode, is a typographic character used to illustrate the effect of a combining mark, such as a diacritic mark. In Windows, it is possible to use the key combination to produce the character.Illustration
A Unicode combining mark combines with a preceding character. When used as stand-alone, it would combine unintentionally with a preceding character :
Using the generic dotted circle character also shows the relative positioning of the diacritic.
