From this palette, you can select characters that are not accessible via the keyboard.

Font Family
Select the desired font family.

Font Style
Select the desired font style from which the character should be inserted.

Selection Area
The characters are inserted into the text with a simple click. Hovering the cursor over the individual characters will display information about the name and the Unicode address. At the bottom of the selection area, there is an option for filtering. You can enter either the Unicode address or parts of the name there. Digits can be filtered with the keyword DIGIT, and letters with the keyword LETTER.