diff --git a/sysutils/zpool-iostat-viz/files/patch-zpool-iostat-viz b/sysutils/zpool-iostat-viz/files/patch-zpool-iostat-viz
index 2e696b6e5f9c..6f8ea84cea21 100644
--- a/sysutils/zpool-iostat-viz/files/patch-zpool-iostat-viz
+++ b/sysutils/zpool-iostat-viz/files/patch-zpool-iostat-viz
@@ -1,49 +1,51 @@
 --- zpool-iostat-viz.orig	2021-11-06 15:43:57 UTC
 +++ zpool-iostat-viz
 @@ -19,7 +19,10 @@ import sys
  EMPTY_COLORS = (238, 8)
  EMPTY_CHAR = "|"
  PALETTES = list(range(start, end+(second-start), second-start) for second, start, end in ((63, 27, 207), (87, 51, 231), (116, 123, 88), (220, 226, 196), (224, 231, 196), (80, 51, 196), (77, 40, 225), (225, 231, 201), (243, 240, 255), (227, 226, 231), (27, 21, 51)))
 -DISPLAY_CHARS = ".abcdefghijklmnopqrstuvwxyz^"
 +DISPLAY_CHARS_LETTERS = ".abcdefghijklmnopqrstuvwxyz^"
 +DISPLAY_CHARS_DIGITS = ".0123456789#"
 +DISPLAY_CHARS_SYMBOLS = " .:;*#"
 +DISPLAY_CHARS = DISPLAY_CHARS_LETTERS
  DIFFL_CLOCK_CHARS = "╷╴╵╶"
  
  DIFFL_STAT_MEMORY = 5
-@@ -219,6 +222,13 @@ def render_stats(window, transform, should_show_differ
+@@ -219,6 +222,15 @@ def render_stats(window, transform, should_show_differ
          elif in_key == curses.KEY_DOWN:
              if diffl_stat_interval_index > 0:
                  diffl_stat_interval_index -= 1
 +        elif in_key == ord('d'):
 +            should_show_differential = not should_show_differential
 +        elif in_key == ord('m'):
++            current = 0
++            stats_history = []
 +            if transform == stats_as_device_centric:
 +                transform = stats_as_measurement_centric
 +            else:
 +                transform = stats_as_device_centric
          elif in_key == ord('q') or in_key == ord('x') or in_key == 27:
              return
          current += len(stats)
 @@ -256,6 +266,8 @@ if __name__ == "__main__":
          arg_parser.add_argument("--pal-count", "--pc", action="store", metavar="P", default="0", help="palette for bucket populations")
          arg_parser.add_argument("parts", metavar="pool/vdev", nargs="*", help="Pools or vdevs to display")
          arg_parser.add_argument("--help-colors", action="store_true", help="see color palettes available")
 +        arg_parser.add_argument("--digits", action="store_true", help="use digits instead of letters")
 +        arg_parser.add_argument("--symbols", action="store_true", help="use digits instead of letters")
  
          parsed_args = vars(arg_parser.parse_args())
  
 @@ -276,6 +288,11 @@ if __name__ == "__main__":
                  print()
              sys.exit(0)
  
 +        if parsed_args["digits"]:
 +            DISPLAY_CHARS = DISPLAY_CHARS_DIGITS
 +        if parsed_args["symbols"]:
 +            DISPLAY_CHARS = DISPLAY_CHARS_SYMBOLS
 +
          curses.wrapper(lambda window: main(window, parsed_args["diff"], parsed_args["parts"], parsed_args["file"], parsed_args["by"] or "m"))
      except subprocess.CalledProcessError as exc:
          print("I couldn't get your pool information. Make sure you have 'zpool' program and specify your pool correctly.")