You might re-use, copy, or build upon another person's scholarly work in several ways, and you can also take steps to ensure your work is available for viewing by the widest audience and able to be re-used, copied, or built upon as you choose. Considering these different lenses of activities will help you.
Re-using and sharing materials in the classroom (physical, virtual, or recorded):
Re-using materials in publications and at conferences:
License materials you create to allow re-use:
You can negotiate for the rights you want or need when publishing journal articles.
Authors typically sign a copyright transfer form or copyright agreement form when submitting an article. These commonly prohibit you from activities you might want or need to do: depositing copies of the article into repositories like PubMed Central; sending copies to colleagues; sharing a copy on your own website; re-using images or substantial parts of the text in any other publications or presentations. Open Access publishing schemes typically allow authors to retain more rights relating to deposit, sharing, and re-use.
You can negotiate the copyright agreement form with the publisher to retain the rights you want to keep. If the funder of your research requires you to comply with Public Access Mandates to deposit your publications into a repository, you MUST negotiate with publishers to ensure you have the right to do this. One way to start this negotiation is to provide a addendum to the publisher-provided copyright form.