This command allows you to export an Aperture List file from the currently loaded database. This file is only necessary if you are exporting your data as 274-D Gerber files.
Select the File|Export|Aperture List command. The Export Aperture List As dialog box appears.
Select a file name for your aperture list, and click the Save button. Only the VisualCAM .map format is supported, although you can assign any desired extension to the file.