- In WordPress, go to Appearance – > Menus and fill Menu name and create menu.
- In left column select Pages, Categories, Posts or what you want to add to menu and click on Add to Menu and Save Menu.
- Also in left column set Theme Location. Choose created Menu for Primary Menu and save it.
If you click on Screen Options you can active box with Posts or Tags. After this you will be able to add them to your menu.