New features

• A new task, ech_genflat, has been added. This task outputs flat-field balance factors as generated by ech_ffield to an image. The image can then be inspected using, e.g., KAPPA DISPLAY.
• The design of the interface in parameter editors has been altered to make them a little easier to use.
• The parameter TUNE_USE_NXF has been `enhanced'. Previously, this parameter set the fraction of an order (in the dispersion direction) to be used when profiling; setting the parameter to a value of 1.0 selected a `special' mode where each order was separately profiled. This behaviour remains the same; however, it is now possible to select individual-order profiling and set the fraction of each order to be used. For example, a value for TUNE_USE_NXF of 1.2 selects the central 20% of each order and individual-order profiling.
• `QUIT' and `Q' have been added as aliases for EXIT in the echmenu top-level menu.
• `Q' has been added as an alias for `E' (EXIT) in the ech_plot top-level menu.
• The task ech_fcheck now checks both input and trace frames for bad-pixel values in their data arrays. The trace frame is now checked for saturated pixels.
• In the plotting task the full option menu is displayed only once. The menu can be redisplayed by pressing `M' as in other tasks.
• In the plotting task when displaying reduction data the default prompt now automatically sets its self to point at the next order for the last data plotted. For example a plot of `OBJ[1,1]' -- the first order of the object--will set the default value to `OBJ[1,2]' --the next order. This means it is much faster to check through all the orders.