Designing the ballot is one of the most important tasks in running an election - voters of all education levels must be able to understand how to use the ballot with minimal confusion in order to be sure their vote is correctly communicated through their ballot. Essentially, the ballot layout must be easy to understand and guide voters through the sometimes-complicated process of voting with little difficulty. Essentially, the ballot must be designed for maximum usability by the voter. The Center for Civic Design has a set of "Field Guides to Ensuring Voter Intent" available to help election officials create the most usable experience for any and all voters.
Volumes One through Three focus on ballot design, and the principles laid out in those volumes apply to ranked choice voting ballots the same as they apply to any other kind of ballot.
The Center for Civic Design has also produced a report on "best practices for ranked choice voting ballots" which is available below.
Minneapolis Proposed Best Practices Ballot (Optical Scan)
FairVote Model Ballot (Grid Style)
Principles and Guidelines Report (Ballot Design Guidelines begin on pg. 44 of this report)
Ballot Design Testing Documents (Multi-Style)
Optical Scan Ballots
Maine Sample Ballot Design (2017)