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spec: When the user clicks on the Pause button , the function calls the banner_main ( ) function . By providing a prefix argument , the function calls filename-at-point and switches you to a buffer visiting the file filename in another window . The sons are probably either priests or killers or both . Consider who you might choose to be your proxy . Select among the thumbnail images at right for enlarged versions and my comments on these `` best of the best '' images . For example , for the help system in an IDE , a user could browse a function reference where you have created custom tags , and when the user clicks on the function name , the function call could be inserted into the user 's code .