To run Font Settings dialog box select Options → Fonts…. from the main menu or selects Fonts…. command from the context menu, which appears after right-click in a dictionary list or in article window.

Font Settings dialog box contains following controls.
Russian font name
You can select a font to display Russian and Western characters in various dictionary items, e.g. in translations of words.
Kanji font name
You can select a font to display kanji characters in various dictionary items, e.g. in a word written with kanji. The list contains all the fonts for Japanese characters installed on the computer.
Input font height
You can select font height for the input field, which is located above the dictionary list.
List font height
You can select font height for dictionary lists.
Article font height
You can select font height for the text of dictionary article, which is located at the bottom of the main window.
Default
After pressing on this button the program restores default values: Arial font for Russian or Western characters, MS Gothic for kanji. Font height will be set to 10 points.
OK
After pressing on this button the program closes the dialog window and stores selected values.
Cancel
After pressing on this button the program closes the dialog window but restores font settings, which were used before opening the dialog box.