diff --git a/Cargo.toml b/Cargo.toml
index 03689f8..6535ebd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,6 +3,12 @@ name = "eink_waveshare_rs"
 version = "0.1.0"
 authors = ["Christoph Groß <christoph.gross@student.uni-tuebingen.de>"]
 
+
+[features]
+default = []
+# Activates the fast LUT for EPD4in2
+epd4in2_fast_update = []
+
 [dependencies]
 
 
diff --git a/src/epd4in2/constants.rs b/src/epd4in2/constants.rs
index ea703e5..190181f 100644
--- a/src/epd4in2/constants.rs
+++ b/src/epd4in2/constants.rs
@@ -11,7 +11,7 @@ pub(crate) const LUT_VCOM0: [u8; 44] = [
 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 ];
 
-
+#[cfg(feature = "epd4in2_fast_update")]
 pub(crate) const LUT_VCOM0_QUICK: [u8; 44] = [
 0x00, 0x0E, 0x00, 0x00, 0x00, 0x01,        
 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,        
@@ -33,7 +33,7 @@ pub(crate) const LUT_WW: [u8; 42] =[
 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 ];
 
-
+#[cfg(feature = "epd4in2_fast_update")]
 pub(crate) const LUT_WW_QUICK: [u8; 42] =[
 0xA0, 0x0E, 0x00, 0x00, 0x00, 0x01,
 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
@@ -55,7 +55,7 @@ pub(crate) const LUT_BW: [u8; 42] =[
 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,      
 ];
 
-
+#[cfg(feature = "epd4in2_fast_update")]
 pub(crate) const LUT_BW_QUICK: [u8; 42] =[
 0xA0, 0x0E, 0x00, 0x00, 0x00, 0x01,
 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
@@ -77,7 +77,7 @@ pub(crate) const LUT_BB: [u8; 42] =[
 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             
 ];
 
-
+#[cfg(feature = "epd4in2_fast_update")]
 pub(crate) const LUT_BB_QUICK: [u8; 42] =[
 0x50, 0x0E, 0x00, 0x00, 0x00, 0x01,
 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
@@ -99,7 +99,7 @@ pub(crate) const LUT_WB: [u8; 42] =[
 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,            
 ];
 
-
+#[cfg(feature = "epd4in2_fast_update")]
 pub(crate) const LUT_WB_QUICK: [u8; 42] =[
 0x50, 0x0E, 0x00, 0x00, 0x00, 0x01,
 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
diff --git a/src/epd4in2/mod.rs b/src/epd4in2/mod.rs
index 4874e34..0f5ee76 100644
--- a/src/epd4in2/mod.rs
+++ b/src/epd4in2/mod.rs
@@ -44,8 +44,7 @@
 //!
 //!
 //!
-//! BE CAREFUL! The Partial Drawing can "destroy" your display.
-//! It needs more testing first.
+//! BE CAREFUL! The screen can get ghosting/burn-ins through the Partial Fast Update Drawing.
 
 use hal::{
     blocking::{delay::*, spi::Write},
@@ -222,7 +221,6 @@ where
 
         self.send_command(Command::VCOM_AND_DATA_INTERVAL_SETTING)?;
         //TODO: this was a send_command instead of a send_data. check if it's alright and doing what it should do (setting the default values)
-        //oldTODO is this really a command here or shouldn't that be data?
         //self.send_command_u8(0x97)?; //VBDF 17|D7 VBDW 97  VBDB 57  VBDF F7  VBDW 77  VBDB 37  VBDR B7
         self.send_data(0x97)?;
 
@@ -372,9 +370,10 @@ where
     }
 
     /// Fill the look-up table for a quick display (partial refresh)
-    ///
-    /// Is automatically done by [EPD4in2::display_frame_quick()](EPD4in2::display_frame_quick())
+    /// 
+    /// Is automatically done by [EPD4in2::display_frame_quick()](EPD4in2::display_frame_quick()) 
     /// //TODO: make public?
+    #[cfg(feature = "epd4in2_fast_update")]
     fn set_lut_quick(&mut self) -> Result<(), E> {
         self.set_lut_helper(
             &LUT_VCOM0_QUICK,