For mock drafting on this site, you should use the Draft Simulator. The interface is almost identical to the Draft Assistants. For mock drafts on Yahoo and ESPN, MVP users will be able to use the Draft Assistant w/ Sync with Yahoo!, Sleeper and ESPN mock drafts.
For mocks on other sites, such as CBS Sports, you can use our Manual Draft Assistant to manually track taken players.
If you decide to use the Draft Assistant during a mock draft, please keep in mind that most mock drafts move at a faster pace than real drafts so your time to play with the features may be limited.