You can change the order your categories and products are displayed. Drag and drop them by clicking and holding the icon shown below.
If you want to hide, but not delete, a menu or an item, simply uncheck the eye icon. It will be hidden immediately!
To remove a menu or an item click on the trashcan icon as shown under. Keep in mind that main categories cannot be deleted if it contains any entries!
Once you are happy with all the changes to your menu remember to click on "Publish menu"! Only then will the changes take effect.