OJS 3 includes a number of free themes that you can use for your journal. You can view them on PKP’s demo site.
You can use one of the free themes as a basis for your journal and customize, which can be installed through the Plugin Gallery. Once you have enabled a theme in Settings > Website > Appearance, additional options will be available to customize colours and adjust other aspects of your journal’s appearance.
PKP has a guide to Designing Your Journal, which offers guidance on how to customize themes, create CSS files, and select images and fonts to suit your audience and content.
You can also develop your own OJS 3 theme, either from scratch or using one of the existing themes as a starting point. Please see PKP’s Theming Guide for additional information.
OJS, OMP, and OPS come with a number of built in blocks you can add to your sidebar under Website Settings > Appearance. If you want to add a custom block to your sidebar, you can use the Custom Blocks plugin. Learn how to use the Custom Blocks plugin here.
Try clearing the cache on your browser and then reload the page. The new image should appear. If this does not solve the problem, talk to your site administrator. They can check that your file permissions are set correctly or try increasing the upload_max_filesize, post_max_size, memory limit, and/or max_execution on your server.
You can use the Publisher Library feature to upload and share files with your users, such as a .doc template for authors. You can optionally make them public and link to them via a public url. Please see the Learning OJS 3 user guide for further instructions.
Try re-indexing your site.
Every multi-journal site has a URL for a site-wide search at [yourdomain]/index/search. To make the search available to your readers, create a custom menu item for it under Settings > Website > Setup > Navigation.
See Learning OJS 3 - Continuous Publishing & Early View for more information.
OJS, OMP, and OPS have a DOI Plugin used to generate DOIs as well as plugins for Crossref, Medra, and Datacite that create and export metadata to each of these agencies.. You will need to obtain membership from one of these agencies to use DOIs. See the DOI Plugin Guide for more information.
OJS is optimized to allow your site content to be indexed by Google Scholar. This is accomplished by providing structured metadata in the backend of every page on your site that can be read by web crawlers and by allowing you to add metatags to your site when you set it up to help your journal be discovered by search engines. However, there are some things that can interfere with Google Scholar indexing. See PKP’s guide to Google Scholar Indexing.