Open the chapter in your book and click add next to Words. Choose the type of entry, then fill in the word in your native language and in the language you are learning. Optionally add an article, a description, an example sentence, an image and an audio recording. Once saved, the word starts at level 0. To learn it, add its chapter to a deck. You can also import many words at once from a CSV file. The vocafox manual explains every step in detail.
Looking for step-by-step instructions? Read the vocafox manual.