Nota:
- Projects, the all-new projects experience, is now available. For more information about Projects, see About Projects.
 - You can only create a new project (classic) for an organization, repository, or user that already has at least one project (classic). If you're unable to create a project (classic), create a project instead.
 
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In the upper-right corner of GitHub, click your profile picture, then click Organizations.
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Click the name of your organization.
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Under your organization name, click Projects.

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Click Projects (classic).
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In the projects list, click the name of the project (classic).
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On the top-right side of the project (classic), click Menu.
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Click , then click Settings.

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In the left sidebar, click Collaborators.
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Next to the collaborator you want to remove, click X.