Not more then 4 stripes for u8g-devices

To optimise speed.
Costs well invested 128Byte of RAM.

Marlin/ultralcd_impl_DOGM.h

@@ -140,36 +140,47 @@
 
 // LCD selection
 #if ENABLED(REPRAPWORLD_GRAPHICAL_LCD)
-  U8GLIB_ST7920_128X64_4X u8g(LCD_PINS_RS);
+  U8GLIB_ST7920_128X64_4X u8g(LCD_PINS_RS); // 2 stripes
+  // U8GLIB_ST7920_128X64 u8g(LCD_PINS_RS); // 8 stripes
 #elif ENABLED(U8GLIB_ST7920)
-  //U8GLIB_ST7920_128X64_RRD u8g(0,0,0);
+  //U8GLIB_ST7920_128X64_4X u8g(LCD_PINS_D4, LCD_PINS_ENABLE, LCD_PINS_RS); // Original u8glib device. 2 stripes
-  U8GLIB_ST7920_128X64_RRD u8g(0);
+                                                                            // No 4 stripe device available from u8glib.
+  //U8GLIB_ST7920_128X64 u8g(LCD_PINS_D4, LCD_PINS_ENABLE, LCD_PINS_RS);    // Original u8glib device. 8 stripes
+  U8GLIB_ST7920_128X64_RRD u8g(0); // Number of stripes can be adjusted in ultralcd_st7920_u8glib_rrd.h with PAGE_HEIGHT
 #elif ENABLED(CARTESIO_UI)
   // The CartesioUI display
   #if DOGLCD_MOSI != -1 && DOGLCD_SCK != -1
     // using SW-SPI
-    U8GLIB_DOGM128 u8g(DOGLCD_SCK, DOGLCD_MOSI, DOGLCD_CS, DOGLCD_A0);
+    //U8GLIB_DOGM128 u8g(DOGLCD_SCK, DOGLCD_MOSI, DOGLCD_CS, DOGLCD_A0);  // 8 stripes
+    U8GLIB_DOGM128_2X u8g(DOGLCD_SCK, DOGLCD_MOSI, DOGLCD_CS, DOGLCD_A0); // 4 stripes
   #else
-    U8GLIB_DOGM128 u8g(DOGLCD_CS, DOGLCD_A0);
+    //U8GLIB_DOGM128 u8g(DOGLCD_CS, DOGLCD_A0);  // 8 stripes
+    U8GLIB_DOGM128_2X u8g(DOGLCD_CS, DOGLCD_A0); // 4 stripes
   #endif
 #elif ENABLED(U8GLIB_LM6059_AF)
   // Based on the Adafruit ST7565 (http://www.adafruit.com/products/250)
-  U8GLIB_LM6059 u8g(DOGLCD_CS, DOGLCD_A0);
+  //U8GLIB_LM6059 u8g(DOGLCD_CS, DOGLCD_A0);  // 8 stripes
+  U8GLIB_LM6059_2X u8g(DOGLCD_CS, DOGLCD_A0); // 4 stripes
 #elif ENABLED(MAKRPANEL) || ENABLED(VIKI2) || ENABLED(miniVIKI)
   // The MaKrPanel, Mini Viki, and Viki 2.0, ST7565 controller as well
-  U8GLIB_NHD_C12864 u8g(DOGLCD_CS, DOGLCD_A0);
+  //U8GLIB_NHD_C12864 u8g(DOGLCD_CS, DOGLCD_A0);  // 8 stripes
+  U8GLIB_NHD_C12864_2X u8g(DOGLCD_CS, DOGLCD_A0); // 4 stripes
 #elif ENABLED(U8GLIB_SSD1306)
   // Generic support for SSD1306 OLED I2C LCDs
-  U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NONE | U8G_I2C_OPT_FAST);
+  //U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NONE | U8G_I2C_OPT_FAST);  // 8 stripes
+  U8GLIB_SSD1306_128X64_2X u8g(U8G_I2C_OPT_NONE | U8G_I2C_OPT_FAST); // 4 stripes
 #elif ENABLED(U8GLIB_SH1106)
   // Generic support for SH1106 OLED I2C LCDs
-  U8GLIB_SH1106_128X64 u8g(U8G_I2C_OPT_NONE | U8G_I2C_OPT_FAST);
+  //U8GLIB_SH1106_128X64 u8g(U8G_I2C_OPT_NONE | U8G_I2C_OPT_FAST);  // 8 stripes
+  U8GLIB_SH1106_128X64_2X u8g(U8G_I2C_OPT_NONE | U8G_I2C_OPT_FAST); // 4 stripes
 #elif ENABLED(MINIPANEL)
   // The MINIPanel display
-  U8GLIB_MINI12864 u8g(DOGLCD_CS, DOGLCD_A0);
+  //U8GLIB_MINI12864 u8g(DOGLCD_CS, DOGLCD_A0);  // 8 stripes
+  U8GLIB_MINI12864_2X u8g(DOGLCD_CS, DOGLCD_A0); // 4 stripes
 #else
   // for regular DOGM128 display with HW-SPI
-  U8GLIB_DOGM128 u8g(DOGLCD_CS, DOGLCD_A0);  // HW-SPI Com: CS, A0
+  //U8GLIB_DOGM128 u8g(DOGLCD_CS, DOGLCD_A0);  // HW-SPI Com: CS, A0  // 8 stripes
+  U8GLIB_DOGM128_2X u8g(DOGLCD_CS, DOGLCD_A0);  // HW-SPI Com: CS, A0 // 4 stripes
 #endif
 
 #ifndef LCD_PIXEL_WIDTH