diff --git a/labygui.py b/labygui.py
index b1e4124..049a898 100644
--- a/labygui.py
+++ b/labygui.py
@@ -46,14 +46,14 @@ def previous(event):
     index -= 1
     aller_selon(path)
 
-def left(event):
+def left(event, step):
   global path, index
-  path[index] = (round(path[index][0] + 0.1, 1), path[index][1])
+  path[index] = (round(path[index][0] + step, 2), path[index][1])
   aller_selon(path)
 
-def right(event):
+def right(event, step):
   global path, index
-  path[index] = (round(path[index][0] - 0.1, 1), path[index][1])
+  path[index] = (round(path[index][0] - step, 2), path[index][1])
   aller_selon(path)
 
 def up(event):
@@ -83,8 +83,10 @@ master.bind('<Return>', add)
 master.bind('<BackSpace>', remove)
 master.bind('<Prior>', previous)
 master.bind('<Next>', next)
-master.bind('<Left>', left)
-master.bind('<Right>', right)
+master.bind('<Left>', lambda e: left(e, 0.1))
+master.bind('<Right>', lambda e: right(e, 0.1))
+master.bind('<Shift-KeyPress-Left>', lambda e: left(e, 0.01))
+master.bind('<Shift-KeyPress-Right>', lambda e: right(e, 0.01))
 master.bind('<Up>', up)
 master.bind('<Down>', down)
 master.bind('p', print_code)
@@ -105,7 +107,7 @@ def draw_line(x1, y1, x2, y2, color):
   canvas.create_line(x1 + 1, y1 + 1, x2 + 1, y2 + 1, fill = color, width = 2.0)
 
 def draw_help():
-  help = 'change angle: Left/Right, change length: Up/Down, add/remove element: Enter/BackSpace, previous/next element: PgUp/PgDn, print code: P, exit: Esc'
+  help = 'change angle: [Shift+] Left/Right, change length: Up/Down, add/remove element: Enter/BackSpace, previous/next element: PgUp/PgDn, print code: P, exit: Esc'
   canvas.create_text(4, screen_h + 36, anchor = NW, text = help, fill = 'black')
 
 def draw_path():