I would like to know how to change the viewing authority for each project category.
I want to separate people who can view and people who can't view.
@Hideki Yamada welcome to the Atlassian community
The ability to view a project is handled by the access provided in the projects permission scheme. Usually this is a project role but could be a group our individual. Project categories are used to organize projects no access.
https://support.atlassian.com/jira-cloud-administration/docs/manage-project-permissions/
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