Usually you will be asked to sign a copyright permission form for your publisher. However, not all publishers are the same. Consult Sherpa/Romeo for details about how many rights you retain as author.
To find out what rights you have about reusing your article or having it in an Institutional Repository or on your own webpage please first consult:
Examples of permission forms from some publishers:
From Sage Publishers
Remember you can assign a creative commons licence to your work yourself:
Examples of copyright messages that authors have put on their open access journal articles.
