If necessary, switch to the Issue Tracker view through the top-left menu icon:
Clicking your profile picture/avatar on the top-left and selecting Profile from the drop-down menu:
In theDetailssection, click the pencil icon to edit your profile details:
The Edit Profile screen is displayed where you can edit your display name, email address, and password. For enhanced security, Jira requires you to confirm your password when changes are made to your profile.