The following options are available via the file menu:

Display File Browser

If XDir is not running, start it. If the XDir directory browser is running, this option will raise the browser to the top of the window stack (or un-iconify it, if necessary). XDir then can be used to send image file names to SAOtng for display.

Load Image

Brings up a dialog box into which an image file name can be entered for display. Press carriage return in the text window or click the OK button to load the image. (See Image File Formats.)

Save Image

Regardless of the original image file format, SAOtng maintains a FITS image of the displayed image section in its memory. This FITS image has the data type of the original data and is used for rescaling, analysis, etc. It can be saved to disk using this menu option, which brings up a dialog box into which an output FITS file name can be entered.

Load Markers

Brings up a dialog box into which a region file name can be entered for display. Press carriage return in the text window or click the OK button to load the markers in this file.

Save Markers

Brings up a dialog box into which a region file name can be entered. The currently displayed markers are saved in this file.

Send Screen To Printer/File

Brings up a dialog box into which a print directive can be entered. Pressing carriage return in the text window or clicking the OK button will cause SAOtng to create PostScript of the image and pipe or redirect the output to the specified print command. The default command is lpr which causes the PostScript to be piped to lpr. The Postscript output can be sent to other processes or saved on disk. (See Printing Images.)

Save Screen To GIF File

Brings up a dialog box into which a filename can be entered. Pressing carriage return in the text window or clicking the OK button will cause SAOtng to store the current display frame in GIF format.

Set Section To Load

Select the section of an image to be extracted and displayed. After choosing the image section and block factor for extraction currently loaded images can be redisplayed or new images can be loaded and displayed using these new parameters (using the Redisplay Current Image or Load Image menu options).

The following sub-menu options are available:

Full Image

A block factor will be chosen so that the full image can be displayed in the current frame.

Center Of Image

The central area of the image will be displayed. The size of the image section will depend on the currently selected block factor (see below).

Upper Left Of Image

The upper left area of the image will be displayed. The size of the image section will depend on the currently selected block factor (see below).

Upper Right Of Image

The upper right area of the image will be displayed. The size of the image section will depend on the currently selected block factor (see below).

Lower Left Of Image

The lower left area of the image will be displayed. The size of the image section will depend on the currently selected block factor (see below).

Lower Right Of Image

The lower right area of the image will be displayed. The size of the image section will depend on the currently selected block factor

Set Blocking Factor

Specify the blocking factor at which an image section is extracted. Block factors range from 1 to 32 (in powers of 2) by default. Larger block factors can be added (starting with 64) by means of the Add New Block Factor option.

Set Blocking Function

Specify blocking by summing pixel values or blocking by averaging pixel values. (These choices are not necessarily be supported by all file extraction programs. They are, however, available for IRAF and FITS files.)

Reload Current Image

Re-extract an image section from the current image file and re-display it.

Destroy Current Image

Erase the current image and destroy internal data structures. Note that loading a new image into the current frame accomplishes the same thing.

Quit

Exit the SAOtng program.

Return to Main SAOtng Help Page

Last Updated May 1, 1995