Summary of a FITS file

1. Index : Extension number (0 is Primary Image)
2. Extension: Name of the extensions.
3. Type : Type of the extensions.
   • Binary -- Binary table extension.
   • ASCII -- ASCII table extension.
   • Image -- Primary array or Image extension.
4. Dimension: Size of each extension.
5. View :
   • Header -- Display/Edit header.
   • Image/Plot -- Display image/Plot table using POW or SAOtng (if installed, only for image display). 3D Image cubes are supported.
   • Table -- Display a table. (If the extension is an image, then numerical values of the image are displayed as a table).

     By clicking each button, users are allowed to display or edit (when the file is opened as read/write) the FITS file. Clicking the Header or Table button when its contents are already open will bring that window to the front. Multiple tables of the same extension can be opened by right clicking (Command-Click on MacOS) the Table button. This also brings up a list of all the columns in a table extension, by which one can specify a subset of columns to display. A left click will display all the columns.

Menus

• File
  • New File...: Create a new FITS file.
  • Open File...: Open another FITS file. See File Selection for details.
  • Save: Save any changes to the original file.
  • Save As...: Save file (with modifications) to a new file.
  • Export HDUs...: Save the selected HDUs into a new file.
  • Revert: Throw away any unsaved modifications and reopen the last-saved version of the file.
  • Close: Close the current Summary window and the opened file. If file has been modified, you will be given the opportunity to save the file before closing.
  • Quit: Quit fv. If any open file has been modified, you will be given the opportunity to save it before exitting.
• Edit
  • Undo: Not support in summary windows.
  • Cut HDUs: Delete the selected HDUs. The deleted HDUs go to the clipboard.
  • Copy HDUs: Copy the selected HDUs to the clipboard. Only one item (could be a list of HDUs though, as long as multiple HDUs are cut/copied at once from a file) is kept in the clipboard.
  • Paste HDUs: All the HDUs in the clipboard are appended to the current file.
  • Clear: Not supported in summary windows.
  • Clipboard: Show the contents of the clipboard.
  • New Extension: A new empty extension will be appended to the current file. You can select whether to append an image, ascii table, or binary table.
  • Preferences: Bring up a window from which fv's behavior and appearance can be modified. See the Preferences help file for details.
• Help: A listing of all available help files.