The changes that caused the override are removed. Remove the override: Click the style name in the list. All text in the document that uses that style is also updated.
Update the style to use the overrides: Click the Update button (if there is one), or move the pointer over the style name, click the arrow that appears, then choose Redefine from Selection. In the Font section, click the pop-up menu next to Character Styles. Inserting Greek symbols Using AutoCorrect. Note that this works for one character only and then the font changes back to the normal font. For example, if you type a, Word enters the corresponding Greek lowercase letter. The Greek characters correspond to standard characters. If the text is in a text box, table, or shape, first click the Text tab at the top of the sidebar, then click the Style button. Type the character to insert the required letter or symbol. In the Format sidebar, click the Style button near the top of the sidebar on the right. Select one or more words with the character style you modified. If you don’t want to keep the overrides, you can revert back to the original character style, update the character style with your changes, or use the overrides to create a new character style. The text retains your changes, and an asterisk appears next to the character style name whenever you select the text. If you want to keep the overrides without updating the style, do nothing. This indicates that the style has an override for those characters. If you change the appearance of characters that have a character style applied to them, an asterisk, and in some cases an Update button, appears next to the style’s name in the Character Styles pop-up menu.
The equivalent on the Mac is the expanded keyboard setting.