*******************
			*                 *
			*  Screen Layout  *
			*                 *
			*******************


Upper Third
-----------

	The top 1/3 of of the screen contains three regions; from
left to right:  Commands Region, Status Region, Image Information
Region.

	The Commands Region consists of a single column-menu of
commands to the far left; except for the "Help" and "Exit" commands,
selection of any command will fill the area to the right of the
menu with a sub-menu of commands related to the command chosen from
the mail menu.

	The Status Region, in the middle, displays meaningful
results and reports problems or errors.

	The Image Information Region displays documentary
information related to the image being analyzed or viewed.
Some fields may be edited by the user.


Bottom Two-Thirds
-----------------

	The lower 2/3 of the screen is for display of the primary
image, display of supporting or comparative images, profile
graphs, a window showing a magnified fractional portion of the
primary image, a colorbar, and a color-adjustments menu.

	The primary image is displayed in the largest rectangular
area, left center.  Above the primary image rectangular area are
displayed lane ID labels.  To the left are displayed row-pixel
index numbers and tic marks and, in a different color, base-pair
fragment sizes.  To the right of the image is a vertical scroll
bar used for fragment-size editing.

	After the primary image has been cropped, there appear
above the crop box two or three colored stripes, each containing
some coded text.  Each of these stripes relates to the lanes
of the image; and the codes are read vertically, each column
referring to the lane below (if the cropped image is close to
the top of the image space, these stripes may appear below the
crop box).  The blue stripe contains lane-index numbers which
begin with 0 at the left and increment to the right.  The
green stripe contains lane IDs which are specified in the
selected gel-format file.  Only the last 2 characters of any
lane ID are shown.  While the blue and green stripes
are shown for all images, a red stripe is shown only when
inheritance is active; then, the red stripe shows inheritance
codes from the gel-format file.

	Above the vertical scroll bar are three colored buttons:

Red -- red button pops a window which displays the cropped image
magnified 2X; it is turned off simply by clicking in the magnified
window.

Blue -- the blue button is a 3-state toggle for
stripe-windows which appear at the top or bottom of the crop
box portion of the image once lanes have been identified; the three
states are stripes above, stripes below, stripes off.

Magenta -- the magenta button applies only
when inheritance is active; it is a 3-way toggle:   
	(1) red marker bands, green experimental bands;
	(2) red marker bands off, experimental bands color coded
		by allele, a window to the left of the image
		containing allele colors and sizes.
	(3) same as (2) but window is to the right of the image.


	To the upper right of the vertical scroll bar is a
square window in which is displayed a magnified portion of the
primary image.  The 200x200 window covers a 100x100 portion of
the primary image determined by the location of the pointer
within the primary image.  Magnification is 2X.

	Below the magnified window is a colorbar; to the right
of the colorbar is a menu of buttons and scroll bars for
making adjustments to the installed color table.