In the Paste Special dialog box, you can insert a placed in the clipboard object into the program's Workspace in a desired format. The available formats are: Internal (the program's internal format), Metafile (Vector image) and DIB (Device Independent Bitmap).
The dialog box contains two sections:
Check the Preview check box to preview contents of the clipboard in the Preview window.
The Format section enables you to set one of the three formats for a pasted object:
One or more of them will be gray, if the clipboard stores an object of a different format. For example: if you have copied a bitmap image from a program like Microsoft Paint, the Internal radio button will be gray.