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The display menu allows the user to choose between lookup tables and to change
the contrast of the display. There are two lookup tables, a colour table and a
greyscale. When driven from the Mouse interface, the chosen table always covers
a range between 0 and 2 , where n is in the range 1 to 16. However the
display wraps around, so the full range of allowed data values (0 to 65535) is
covered by 2 wraps of the lookup table.
The following options can be selected by placing the cursor on the option name
on the display menu and pressing :-
- GREY - Selects the Greyscale lookup table and leaves the user
in the Display menu.
- COLOUR - Selects the Colour lookup table and leaves the user in
the Display menu.
- REVERSE - Reverses the lookup table and leaves the user in the
- SHIFT - After selecting this option with , pressing
again increases the contrast of the display, i.e. reduces
the range that one wrap of the lookup table covers, by a factor of two.
decreases the contrast of the display, i.e. increases the
range that one wrap of the lookup table covers, by a factor two.
returns the user to the Display menu, leaving the lookup
table as it was last set.
- NORMAL -
Wed Sep 17 12:36:20 BST 1997