edt: Scroll margins

 
 7.4 Setting Scroll Margins
 ==========================
 
 Scroll margins at the top and bottom of the window are now supported.
 (The design was copied from ‘tpu-extras.el’.)  By default, this feature
 is enabled with the top margin set to 10% of the window and the bottom
 margin set to 15% of the window.  To change these settings, you can
 invoke the function ‘edt-set-scroll-margins’ in your ‘.emacs’ file.  For
 example, the following line
 
      (edt-set-scroll-margins "20%" "25%")
 
 sets the top margin to 20% of the window and the bottom margin to 25% of
 the window.  To disable this feature, set each margin to 0%.  You can
 also invoke ‘edt-set-scroll-margins’ interactively while EDT Emulation
 is active to change the settings for that session.
 
    *Please note:* Another way to set the scroll margins is to use the
 Emacs customization feature to set the following two variables directly:
 ‘edt-top-scroll-margin’ and ‘edt-bottom-scroll-margin’.
 
    Enter the Emacs ‘customize’ command.  First select the ‘Editing’
 group and then select the ‘Emulations’ group.  Finally, select the ‘Edt’
 group and follow the directions.