Close mutiple PowerPoint presentation windows

 There are two ways to open a new presentation. Right click the tab and select "new" in the pop-up menu. Or you can double click Left Mouse Button on the blank area of Tab bar to create new document. Through the right-click menu you can also open folders where the presentations exist.

 There are two ways to close the presentations. You can Close Tabs by clicking Middle Mouse Button or Double click Left Mouse Button on the Tab. It is available to close all presentations and other presentations. Select the function in the pop-up menu by right clicking the tab.