If are at the live draft there is an option on the screen to use the Yahoo
rankings or your own. Both sets are available in a pull-down list.
If you are not at the the live draft, the system puts you into autopick.
The following is from Yahoo Help.
When you're unable to draft players for yourself,
our Autopick system will make intelligent choices for you.
How Autopick works
Autopick is used when:
* Your Autopick league draft status is Ready
* If you're not present for all or part of your live draft
The Autopick system first selects the highest rated available player that
can fill one of the open starting positions on your roster.
Once the starting positions are filled, Autopick determines the appropriate
bench positions and fills them.
All player selections are based first on your pre-rankings and then by the
Yahoo Sports default rankings.
Specific positions can't be designated to be selected in specific rounds of
the draft. All autopicks are made based on your pre-ranking.
Example: It isn't possible to tell our Autopick system to draft a shortstop in
the 1st round, a relief pitcher in the 2nd round, etc...