How could I change themes in OJS3? or How I add theme plugin? It seems that only default theme is available
At the moment OJS3 only ships with the default theme. There’s also a Bootstrap-based theme which is designed to be a starter theme for developers.
At the moment that’s all that is available, though we plan to expand on this in the future. And we hope that other users will create and make available their own themes to be shared with the community.