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Interface options

The various interface options are each described in detail in their appropriate sections. They are:

• MODE: list or image.
• PEN: The colour on image displays, but has no meaning for hardcopies.
• XST: X-coordinate of start region of interest.
• YST: Y-coordinate of start of region of interest.
• XEND: X-coordinate of end of region of interest.
• YEND: Y-coordinate of end of region of interest.
• ECHO: Decides if commands run within a procedure are displayed on the screen to the user.
• MARKER: The specification of symbols for hardcopy plots. These are defined in the PGPLOT manual, and are specified by a number in the range 0 to 127. The numbers after 31 are just the corresponding ASCII characters.

All of these can be changed with the SET command, although one further interface option, the graphics device, can only be set with the specific DEVICE command.