«~F3~~s12~~SB~~SU~~C~EPSF:~SP~~L~~s9~~SB~What is EPSF?:~SB~EPSF is the ~SB~E~SB~ncapsulated ~SB~P~SP~ost~SB~S~SB~cript ~SB~F~SB~ile format. Images stored in this format can be easily printed using PostScript halftoning on a PostScript printer.~SB~Opening EPSF Files:~SB~In general foreign EPSF files ~SU~cannot~SU~ be opened with Vision Lab. A few EPSF files can be loaded as GrayMapFiles. See the section on GrayMapFiles for more information.~SB~Saving EPSF Files:~SB~There are two parts to a Macintosh EPSF file. One is the PostScript code and the other is the image used to display the file on the screen when you import the file into a page make up program. The ╥screen representation╙ image will come from the front most window whether it be the pixmap or the bitmap. If the pix map cannot be displayed on the machine you are using you must open a bit map to save an EPSF file! The PostScript code generated will depend on the EPSF preferences you have set.The brightness and contrast settings of the gray map will be applied to the image when saving it as a EPSF file.~SB~EPSF Preferences╔:~SB~If ~SB~4 Bit (16 gray levels)~SB~ is selected then the PostScript code will generate 4 bit halftones. If ~SB~8 Bit (256 gray levels)~SB~ is selected then the PostScript code will generate 8 bit halftones. Note that saving images using 256 gray levels usually produces a higher quality image but takes up twice the disk space. Also note that one bit deep pixmaps and bitmap are ~SU~always~SU~ saved using 1 bit (black and white) PostScript code. If ~SB~Always use PixMap~SB~ is checked then the pixmap will always be used for the PostScript code. This option allows you to generate a bitmap approximation to the image and use it as the screen representation while using the pixmap for the actual PostScript code generation. Doing this has a number of benefits. First the printer output is identical and second you still get to see a screen representation of the image. All this while saving disk space too.~SB~Pros:~SB~PostScript code can produce some amazing results when printed on the LaserWriter or other PostScript printers. EPSF files can be easily imported into such programs as Ready, Set, Go!¬ and PageMaker¬. Because a separate screen representation image is stored with the file you will be able to get a preview of what the layout looks like in page make up programs.~SB~Cons:~SB~Vision Lab EPSF files can only handle gray scale information. Any color information is lost when saving as a EPSF file. EPSF files are large because they are stored in an ASCII format and compression is not supported. Very few programs can read in the EPSF file to edit the information it contains.
