diff --git a/README.md b/README.md
index ee65302..ac61a5c 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,8 @@ LZ-String, Copyright 2013 pieroxy under MIT license https://github.com/pieroxy/l
 
 ### 0.4.11
 
-* Copy and Paste
+* Copy and Paste, note that Paste in the menu may not work on some browsers because of security permissions, but standard keyboard shortcuts will work.
+* Added !PRE and !CLR to flipflops, these are ACTIVE LOW inputs so you must make them high to use the flipflop.
 
 ### 0.4.10
 
diff --git a/js/elements/FFElements.js b/js/elements/FFElements.js
index 8054b56..841875c 100644
--- a/js/elements/FFElements.js
+++ b/js/elements/FFElements.js
@@ -1,12 +1,12 @@
 class FlipFlopJK extends Element {
   constructor(_Container, RestoreData = null, logicengine) {
-    super(_Container, RestoreData,logicengine,3);
+    super(_Container, RestoreData,logicengine,5);
     this.Name = "JK-FF";
     this.Outputs = new Array(2);
-    this.InputLabels = new Array("J","CLK","K");
+    this.InputLabels = new Array("J","CLK","K","!PRE", "!CLR");
     this.OutputLabels = new Array("Q","~Q");
     this.removeProperty("Inputs");
-    this.Height = 80;
+    this.Height = 140;
 
     if (RestoreData) {
       this.Outputs = RestoreData.OutputStates;
@@ -43,6 +43,14 @@ class FlipFlopJK extends Element {
         this.Outputs[1] = !this.Outputs[0];
       }
     }
+    if (!this.Inputs[3]) {
+      this.Outputs[0] = true;
+      this.Outputs[1] = false;
+    }
+    if (!this.Inputs[4]) {
+      this.Outputs[0] = false;
+      this.Outputs[1] = true;
+    }
     if (oldOutput != this.getOutput(0) || oldOutput2 != this.getOutput(1)) {
       this.setConnections();
     }
@@ -71,13 +79,13 @@ ElementCategory_FlipFlop.addElement(ElementCatalog_JKFlipFlop);
 
 class FlipFlopSR extends Element {
   constructor(_Container, RestoreData = null, logicengine) {
-    super(_Container, RestoreData,logicengine,3);
+    super(_Container, RestoreData,logicengine,5);
     this.Name = "SR-FF";
     this.Outputs = new Array(2);
-    this.InputLabels = new Array("S","CLK","R");
+    this.InputLabels = new Array("S","CLK","R","!PRE", "!CLR");
     this.OutputLabels = new Array("Q","~Q");
     this.removeProperty("Inputs");
-    this.Height = 80;
+    this.Height = 140;
 
     if (RestoreData) {
       this.Outputs = RestoreData.OutputStates;
@@ -111,6 +119,15 @@ class FlipFlopSR extends Element {
         this.Outputs[1] = false;
       }
     }
+
+    if (!this.Inputs[3]) {
+      this.Outputs[0] = true;
+      this.Outputs[1] = false;
+    }
+    if (!this.Inputs[4]) {
+      this.Outputs[0] = false;
+      this.Outputs[1] = true;
+    }
     if (oldOutput != this.getOutput(0) || oldOutput2 != this.getOutput(1)) {
       this.setConnections();
     }
@@ -139,13 +156,13 @@ ElementCategory_FlipFlop.addElement(ElementCatalog_SRFlipFlop);
 
 class FlipFlopT extends Element {
   constructor(_Container, RestoreData = null, logicengine) {
-    super(_Container, RestoreData,logicengine,2);
+    super(_Container, RestoreData,logicengine,4);
     this.Name = "T-FF";
     this.Outputs = new Array(2);
-    this.InputLabels = new Array("T","CLK");
+    this.InputLabels = new Array("T","CLK","!PRE","!CLR");
     this.OutputLabels = new Array("Q","~Q");
     this.removeProperty("Inputs");
-    this.Height = 80;
+    this.Height = 120;
 
     if (RestoreData) {
       this.Outputs = RestoreData.OutputStates;
@@ -172,6 +189,16 @@ class FlipFlopT extends Element {
       this.Outputs[0] = !this.Outputs[0];
       this.Outputs[1] = !this.Outputs[0];
     }
+
+    if (!this.Inputs[2]) {
+      this.Outputs[0] = true;
+      this.Outputs[1] = false;
+    }
+    if (!this.Inputs[3]) {
+      this.Outputs[0] = false;
+      this.Outputs[1] = true;
+    }
+
     if (oldOutput != this.getOutput(0) || oldOutput2 != this.getOutput(1)) {
       this.setConnections();
     }
@@ -200,13 +227,13 @@ ElementCategory_FlipFlop.addElement(ElementCatalog_TFlipFlop);
 
 class FlipFlopD extends Element {
   constructor(_Container, RestoreData = null, logicengine) {
-    super(_Container, RestoreData,logicengine,2);
+    super(_Container, RestoreData,logicengine,4);
     this.Name = "D-FF";
     this.Outputs = new Array(2);
-    this.InputLabels = new Array("D","CLK");
+    this.InputLabels = new Array("D","CLK","!PRE","!CLR");
     this.OutputLabels = new Array("Q","~Q");
     this.removeProperty("Inputs");
-    this.Height = 80;
+    this.Height = 120;
 
     if (RestoreData) {
       this.Outputs = RestoreData.OutputStates;
@@ -234,6 +261,14 @@ class FlipFlopD extends Element {
       this.Outputs[0] = this.Inputs[0];
       this.Outputs[1] = !this.Outputs[0];
     }
+    if (!this.Inputs[2]) {
+      this.Outputs[0] = true;
+      this.Outputs[1] = false;
+    }
+    if (!this.Inputs[3]) {
+      this.Outputs[0] = false;
+      this.Outputs[1] = true;
+    }
     if (oldOutput != this.getOutput(0) || oldOutput2 != this.getOutput(1)) {
       this.setConnections();
     }
diff --git a/js/logicengine.js b/js/logicengine.js
index a0a6d25..6c5c548 100644
--- a/js/logicengine.js
+++ b/js/logicengine.js
@@ -260,7 +260,7 @@ class LogicEngine {
   }
 
   Mouse_Down(evt) {
-    if (evt.which === 1) {
+    if (evt.which === 1 && !this.MultiSelectStart.InProgress) {
       let mousePos = getMousePos(this.Canvas, evt);
       this.MouseDownTime = performance.now();
       let element = this.ActiveContainer.checkMouseBounds(mousePos);