If you no longer need or want a window, you can delete if from the workspace.
Note: To delete windows from a workspace you must either be the owner of the workspace, or if you are using a workspace that another user has shared with you, you must have “View and Modify” or “Full Control” permissions for the workspace. For more information about sharing workspaces, see Sharing Workspaces.
To delete a window from a workspace
In the title bar of the window, click Tools and select Delete, or
In the upper, right corner of the workspace click and click Delete for the window you want to remove from the workspace.
After deleting windows, save the workspace to keep your changes by clicking on the tab for the workspace and selecting Save Workspace.