TRANSPOSE (TRANsparency in Scholarly Publishing for Open Scholarship Evolution) is a grassroots initiative to build a crowdsourced database of journal policies to bring clarity to three areas: open peer review, co-reviewing, and detailed preprint policies. The goal is to foster new practices while increasing awareness among authors, editors, and other stakeholders, and to provide resources to assist journals in setting, sharing, and clarifying their policies. The author explains why this is useful, shows the benefits to editors and publishers and calls for new contributors to get involved.