diff --git a/ards.c b/ards.c
index be29f90..bcf0787 100755
--- a/ards.c
+++ b/ards.c
@@ -59,7 +59,7 @@ static int x0 = -485, y0 = 450, x2, y2;
 static void draw_char (cairo_t *cr, cairo_t *cr2, char ch)
 {
   tube_x0 = (int)(efactor * (x0 + 540));
-  tube_y0 = (int)(efactor * (y0 + 707)) - vDotsPerChar/2;
+  tube_y0 = (int)(efactor * (y0 + 707));
   //fprintf (stderr, "[tube: %d,%d]", tube_x0, tube_y0);
   tube_drawCharacter(cr, cr2, ch);
   x0 += (int)(hDotsPerChar / efactor);
diff --git a/main.c b/main.c
index c720c43..12602a1 100644
--- a/main.c
+++ b/main.c
@@ -2,15 +2,8 @@
  *
  * main.c
  * provides a simple framework for basic drawing with cairo and gtk+ 3.0
- * define main window in tek4010.h
- * and cairo drawing in tek4010.c
  * 
- * The framework provides functions to
- *   a function to draw using cairo
- *   a function to initialize your code
- *   a function to exit your code
- *   a peridicaly called function
- *   a function called if the mouse is clicked
+ * Version adapted for tek4010
  * 
  * Copyright 2016,2019  rricharz
  *
diff --git a/tek4010 b/tek4010
index ad4a428..6cf6e97 100755
Binary files a/tek4010 and b/tek4010 differ
diff --git a/tube.c b/tube.c
index 321445d..0f5404b 100755
--- a/tube.c
+++ b/tube.c
@@ -91,6 +91,7 @@ static long charCount = 0;
 static long charResetCount = 0;
 static long characterInterval = 0;
 static int currentFontSize = 18;
+static int currentCharacterOffset = 0;
 
 long startPaintTime;
 
@@ -397,7 +398,7 @@ void tube_doCursor(cairo_t *cr2)
 {
         cairo_set_source_rgb(cr2, 0, CURSOR_INTENSITY, 0);
         cairo_set_line_width (cr2, 1);
-        cairo_rectangle(cr2, tube_x0, windowHeight - tube_y0 - vDotsPerChar + 8,
+        cairo_rectangle(cr2, tube_x0, windowHeight - tube_y0 - vDotsPerChar + 6 + currentCharacterOffset,
                                                 hDotsPerChar - 3, vDotsPerChar - 3);
         cairo_fill(cr2);
         cairo_stroke (cr2);
@@ -479,19 +480,19 @@ void tube_drawCharacter(cairo_t *cr, cairo_t *cr2, char ch)
 
         if (writeThroughMode) {  // draw the write-through character
                 cairo_set_source_rgb(cr2, 0, WRITE_TROUGH_INTENSITY, 0);
-                cairo_move_to(cr2, tube_x0, windowHeight - tube_y0);
+                cairo_move_to(cr2, tube_x0, windowHeight - tube_y0 + currentCharacterOffset);
                 cairo_show_text(cr2, s);
         }
                                                 
         else {
                 // draw the character
                 cairo_set_source_rgb(cr, 0, BLACK_COLOR + ((NORMAL_INTENSITY - BLACK_COLOR) * intensity) / 100, 0);
-                cairo_move_to(cr, tube_x0, windowHeight - tube_y0);
+                cairo_move_to(cr, tube_x0, windowHeight - tube_y0 + currentCharacterOffset);
                 cairo_show_text(cr, s);
                                                 
                 // draw the bright spot
                 cairo_set_source_rgb(cr2, BRIGHT_SPOT_COLOR, BRIGHT_SPOT_COLOR, BRIGHT_SPOT_COLOR);
-                cairo_move_to(cr2, tube_x0, windowHeight - tube_y0);
+                cairo_move_to(cr2, tube_x0, windowHeight - tube_y0 + currentCharacterOffset);
                 cairo_show_text(cr2, s);                        
         }
                                                 
@@ -612,8 +613,18 @@ void tube_setupPainting(cairo_t *cr, cairo_t *cr2, char *fontName)
 void tube_changeCharacterSize(cairo_t *cr, cairo_t *cr2,int charsPerLine, int charsPerPage, int fontSize)
 {
         int fontsize;
+        cairo_font_extents_t et;
         hDotsPerChar = windowWidth / charsPerLine;
         vDotsPerChar = windowHeight / charsPerPage;
         leftmargin = 0;
         currentFontSize = fontSize;
+        cairo_set_font_size(cr, currentFontSize);
+        cairo_set_font_size(cr2,currentFontSize);    
+        if (argARDS) {
+               cairo_font_extents(cr, &et);
+               currentCharacterOffset =(int)et.ascent;
+               if (DEBUG) printf("Set vertical character offset for ARDS mode to %d\n", currentCharacterOffset);
+        }
+        else
+                currentCharacterOffset = 0;
 }