Using the Allow Abstain setting adds Abstain as a choice to your questions. You can use it to allow your voters to choose not to vote on a specific question, versus choosing to not submit a ballot:
Selecting the Allow Abstain setting only affects individual questions, not the entire ballot. Voters can abstain from one or more questions, but still vote on the remaining questions.
Compatible Voting Systems
The Allow Abstain setting can be added to questions using all available voting systems.
Selecting Allow Abstain
To select Allow Abstain for a question:
go to the Ballot page
go to Positions and Questions; add your question
go to Settings; select the box beside Allow Abstain: