How do I post Infographics, Videos etc. Under a Separate Subheading (ie. not under the archive subheading)

Using OJS, I have created a subheading under content called “Knowledge Translation.” Under this section, I would like to post infographics, videos and other multimedia resources. However, I am new to OJS and cannot seem to figure out how to make posts/submissions (?) that do not go directly in the Archive section of our website. Does anyone know how to go about this?