To apply one of the good habits, click the Font sub menu. The three periods let the user that this particular menu will call a dialog box. The second good habit is to provide a mnemonic for each menu item so that the user can access the menu using the keyboard. Good programmers make sure that there is no double underlined letter among those menu words. Only one F is underlined on the whole main menu, only one E, only one V, etc.
Programmers tend to consider the first letter of each top menu.
If you get in a situation where two words start with the same letter, consider using the 2nd letter. On your menu, click Format. This time, you can use the F on Font because Font is a submenu of Format and when the Format menu is opened, the File menu will not be available. The mnemonics can be used anywhere in your application, including dialog boxes, combo boxes, check boxes, radio buttons, etc. So, get in the habit of using them.