diff --git a/tools/make_panel.py b/tools/make_panel.py
index 1664864..56a03ab 100755
--- a/tools/make_panel.py
+++ b/tools/make_panel.py
@@ -13,7 +13,15 @@
 from PIL import Image
 from PIL import ImageFont, ImageDraw, ImageOps
 
-def make_panel(charSquareSize = 33, margin = 80, DPI = 300, fontPath = r'./Hakgyoansim Byeolbichhaneul TTF B.ttf'):
+def make_panel(
+        charSquareSizeMM = 33,
+        charMargin = 80,
+        panelMarginMM = 2.5,
+        drawXOffset = 0,
+        drawYOffset = 0,
+        DPI = 300,
+        fontPath = r'./Hakgyoansim Byeolbichhaneul TTF B.ttf',
+    ):
     panelString = '''
     열한다세네
     두여섯일곱
@@ -22,16 +30,13 @@ def make_panel(charSquareSize = 33, margin = 80, DPI = 300, fontPath = r'./Hakgy
     사오십오분
     '''
     t = ''.join(panelString.split())
-    # panelChars = list(t.decode('utf-8'))
     panelChars = list(t)
 
-    DPI = 300
-    cSizeWithMargin = charSquareSize # 20mm for W & H of one character
-
-    cPix = int((DPI * cSizeWithMargin )/25.4) # 1 inch == 25.4 mm
+    cPix = int((DPI * charSquareSizeMM )/25.4) # 1 inch == 25.4 mm
     cSize = cPix*5
-    panelMarginX = cPix
-    panelMarginY = cPix
+    panelMargin = 2.5
+    panelMarginX = int((DPI * panelMarginMM )/25.4)
+    panelMarginY = int((DPI * panelMarginMM )/25.4)
     panelSize = (cSize+panelMarginX*2, cSize+panelMarginY*2) # 236 == 20mm on 300dpi
 
     print(f"panelSize = {panelSize}")
@@ -39,22 +44,16 @@ def make_panel(charSquareSize = 33, margin = 80, DPI = 300, fontPath = r'./Hakgy
     image = Image.new('RGB', panelSize)
     draw = ImageDraw.Draw(image)
 
-    # The fonts from http://hangeul.naver.com
-    # I used it via ttf-nanum package of Ubuntu linux
-    # fontPath = r'/usr/share/fonts/truetype/nanum/NanumMyeongjo.ttf'
-
     # To find proper fontsize fited-in given dimention
     fontSize = 0
     for i in range(12, 2000):
         font = ImageFont.truetype(fontPath, i, encoding="unic")
-        # text = "한".decode('utf-8')
-        # textSize = font.getsize(text)
         text = "한"
         textSize = font.getlength(text)
         # if textSize[0] > cPix or textSize[1] > cPix:
         if textSize > cPix:
             print (f"Font size {textSize} {i}")
-            fontSize = i - margin
+            fontSize = i - charMargin
             break
 
     font = ImageFont.truetype(fontPath, fontSize, encoding="unic")
@@ -67,14 +66,16 @@ def make_panel(charSquareSize = 33, margin = 80, DPI = 300, fontPath = r'./Hakgy
             xMargin = (cPix - charSize)/2
             yMargin = (cPix - charSize)/2
             #print panelChar.encode('utf-8'), charSize, xMargin, yMargin
-            draw.text((x*cPix+xMargin+panelMarginX, y*cPix+yMargin+panelMarginY),
-                    panelChar, font=font)
-
+            draw.text(
+                (x*cPix+xMargin+panelMarginX+drawXOffset, y*cPix+yMargin+panelMarginY+drawYOffset),
+                panelChar, font=font,
+            )
+            
     # mirror it to toner transfer
     image = ImageOps.mirror(image)
     image.save(f'panel_{os.path.basename(fontPath)}.png', dpi=(DPI, DPI))
 
 if __name__ == '__main__':
-    make_panel()
+    make_panel(drawYOffset=-30)
 
 # vim: et sw=4 fenc=utf-8: