in alternate-display mode, simply decrease the size of the task display(s) above it.

       SORTING of task window

          For compatibility, this top supports most of the former top sort keys.  Since this is primarily a service to former top users, these commands do not appear on any help screen.
                command   sorted‐field                  supported
                A         start time (non‐display)      No
                M         %MEM                          Yes
                N         PID                           Yes
                P         %CPU                          Yes
                T         TIME+                         Yes

          Before  using  any  of the following sort provisions, top suggests that you temporarily turn on column highlighting using the ‘x’ interactive command.  That will help ensure that the actual sort environment matches
          your intent.

          The following interactive commands will only be honored when the current sort field is visible.  The sort field might not be visible because:
                1) there is insufficient Screen Width
                2) the ‘f’ interactive command turned it Off

             <  :Move‐Sort‐Field‐Left
                 Moves the sort column to the left unless the current sort field is the first field being displayed.

             >  :Move‐Sort‐Field‐Right
                 Moves the sort column to the right unless the current sort field is the last field being displayed.

          The following interactive commands will always be honored whether or not the current sort field is visible.

             f  :Fields‐Management
                 This key displays a separate screen where you can change which field is used as the sort column, among other functions.  This can be a convenient way to simply verify the current sort field, when running top
                 with column highlighting turned Off.

             R  :Reverse/Normal‐Sort‐Field toggle
                 Using this interactive command you can alternate between high‐to‐low and low‐to‐high sorts.

   4d. COLOR Mapping
       When you issue the ‘Z’ interactive command, you will be presented with a separate screen.  That screen can be used to change the colors in just the ‘current’ window or in all four windows before returning to  the  top
       display.

       The following interactive commands are available.
           4 upper case letters to select a target
           8 numbers to select a color
           normal toggles available
               B         :bold disable/enable
               b         :running tasks "bold"/reverse
               z         :color/mono
           other commands available
               a/w       :apply, then go to next/prior
               <Enter>   :apply and exit
               q         :abandon current changes and exit

       If you use ‘a’ or ‘w’ to cycle the targeted window, you will have applied the color scheme that was displayed when you left that window.  You can, of course, easily return to any window and reapply different colors or
       turn colors Off completely with the ‘z’ toggle.

       The Color Mapping screen can also be used to change the ‘current’ window/field group in either full-screen mode or alternate-display mode.  Whatever was targeted when ‘q’ or <Enter> was pressed will be made current as
       you return to the top display.

5. ALTERNATE-DISPLAY Provisions
   5a. WINDOWS Overview
       Field Groups/Windows:
          In  full-screen  mode  there is a single window represented by the entire screen.  That single window can still be changed to display 1 of 4 different field groups (see the ‘g’ interactive command, repeated below).
          Each of the 4 field groups has a unique separately configurable summary area and its own configurable task area.

          In alternate-display mode, those 4 underlying field groups can now be made visible simultaneously, or can be turned Off individually at your command.