With this you can set the font and justification for the Tag and UserText
This appears when you have selected a symbol then clicked on "Tag or Text Font and justification" in the Object or Group toolbar. It closes when you select a different font or alignment or press Escape
You have to choose whether to apply the changes to the Tag or the User text.
To change the font click the ABC icon to go to the Font Styles
When in Allow text placement mode the single text toolbar is shown when you click on a text field (Tag or User text)
You can align the text, change the font and size the text object to fit the text