Go to the edit mode by right-click on the chosen project and select Edit Project from the context menu.
After that will open an edit project window:
Members
On this tab you can add and remove members of project.
Tasks
Show all tasks
Show list with all task of the project.
Show only my tasks
Show tasks into chosen project that assignee on you.
Identifier
URL prefix, by which creating project will be available. Once saved, the identifier cannot be changed.
Create
Create an Issue into selected project
Delete
Removes the selected task in this project