shift
It is a button that you can clidk on to close the document that is currently open. Usually we use the x below the x in the very top right corner of the screen. It closes the document, while the one in the top corner closes Word completely.
Data can be imported from other applications and displayed in Powerpoint. Data can be presented in tables that could have come from other applications, such as Excel, Access or Word. Links can enable the data in the presentation to always be up to date, so when the other files change, the presentation will have the most up to date data. Powerpoint can show the actual data in the files, or just have links to the files on the slides that the user can clidk on to open the files.