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.