diff --git a/include/app/CableContainer.hpp b/include/app/CableContainer.hpp
index a629cc51..c726c52f 100644
--- a/include/app/CableContainer.hpp
+++ b/include/app/CableContainer.hpp
@@ -24,8 +24,10 @@ struct CableContainer : TransparentWidget {
 	/** Takes ownership of `w` and adds it as a child if it isn't already */
 	void setIncompleteCable(CableWidget *w);
 	CableWidget *releaseIncompleteCable();
-	/** Returns the most recently added cable connected to the given Port, i.e. the top of the stack */
+	/** Returns the most recently added complete cable connected to the given Port, i.e. the top of the stack */
 	CableWidget *getTopCable(PortWidget *port);
+	CableWidget *getCable(int cableId);
+
 	json_t *toJson();
 	void fromJson(json_t *rootJ, const std::map<int, ModuleWidget*> &moduleWidgets);
 	void draw(NVGcontext *vg) override;
diff --git a/include/app/CableWidget.hpp b/include/app/CableWidget.hpp
index 9418f1c5..6b7b0ed0 100644
--- a/include/app/CableWidget.hpp
+++ b/include/app/CableWidget.hpp
@@ -21,8 +21,8 @@ struct CableWidget : OpaqueWidget {
 	CableWidget();
 	~CableWidget();
 	bool isComplete();
-	void setOutputPort(PortWidget *outputPort);
-	void setInputPort(PortWidget *inputPort);
+	void setOutput(PortWidget *outputPort);
+	void setInput(PortWidget *inputPort);
 	math::Vec getOutputPos();
 	math::Vec getInputPos();
 	json_t *toJson();
diff --git a/include/app/ModuleWidget.hpp b/include/app/ModuleWidget.hpp
index be8185ce..c0e88678 100644
--- a/include/app/ModuleWidget.hpp
+++ b/include/app/ModuleWidget.hpp
@@ -18,8 +18,8 @@ struct ModuleWidget : OpaqueWidget {
 
 	Widget *panel = NULL;
 	std::vector<ParamWidget*> params;
-	std::vector<PortWidget*> inputs;
 	std::vector<PortWidget*> outputs;
+	std::vector<PortWidget*> inputs;
 	/** For RackWidget dragging */
 	math::Vec dragPos;
 	math::Vec oldPos;
@@ -44,12 +44,15 @@ struct ModuleWidget : OpaqueWidget {
 	Transfers ownership
 	*/
 	void setModule(Module *module);
+	void setPanel(std::shared_ptr<SVG> svg);
 
 	/** Convenience functions for adding special widgets (calls addChild()) */
-	void addInput(PortWidget *input);
-	void addOutput(PortWidget *output);
 	void addParam(ParamWidget *param);
-	void setPanel(std::shared_ptr<SVG> svg);
+	void addOutput(PortWidget *output);
+	void addInput(PortWidget *input);
+	ParamWidget *getParam(int paramId);
+	PortWidget *getOutput(int outputId);
+	PortWidget *getInput(int inputId);
 
 	/** Overriding these is deprecated.
 	Use Module::dataToJson() and dataFromJson() instead
diff --git a/include/engine/Module.hpp b/include/engine/Module.hpp
index d8755396..4f639b9b 100644
--- a/include/engine/Module.hpp
+++ b/include/engine/Module.hpp
@@ -15,8 +15,8 @@ namespace rack {
 struct Module {
 	int id = 0;
 	std::vector<Param> params;
-	std::vector<Input> inputs;
 	std::vector<Output> outputs;
+	std::vector<Input> inputs;
 	std::vector<Light> lights;
 	/** For power meter */
 	float cpuTime = 0.f;
diff --git a/include/history.hpp b/include/history.hpp
index 9420d62a..e6dbae7d 100644
--- a/include/history.hpp
+++ b/include/history.hpp
@@ -1,12 +1,18 @@
 #pragma once
 #include "common.hpp"
 #include "math.hpp"
+#include "color.hpp"
 #include "plugin/Model.hpp"
 #include <vector>
 #include <jansson.h>
 
 
 namespace rack {
+
+
+struct CableWidget;
+
+
 namespace history {
 
 
@@ -17,6 +23,17 @@ struct Action {
 };
 
 
+template <class TAction>
+struct InverseAction : TAction {
+	void undo() override {
+		TAction::redo();
+	}
+	void redo() override {
+		TAction::undo();
+	}
+};
+
+
 /** Batches multiple actions into one */
 struct ComplexAction : Action {
 	/** Ordered by time occurred. Undoing will replay them backwards. */
@@ -84,20 +101,14 @@ struct CableAdd : Action {
 	int outputId;
 	int inputModuleId;
 	int inputId;
+	NVGcolor color;
+	void setCable(CableWidget *cw);
 	void undo() override;
 	void redo() override;
 };
 
 
-struct CableRemove : Action {
-	int cableId;
-	int outputModuleId;
-	int outputId;
-	int inputModuleId;
-	int inputId;
-	void undo() override;
-	void redo() override;
-};
+struct CableRemove : InverseAction<CableAdd> {};
 
 
 struct State {
diff --git a/src/app/CableContainer.cpp b/src/app/CableContainer.cpp
index 31557fd0..c23bc9c0 100644
--- a/src/app/CableContainer.cpp
+++ b/src/app/CableContainer.cpp
@@ -86,6 +86,16 @@ CableWidget *CableContainer::getTopCable(PortWidget *port) {
 	return NULL;
 }
 
+CableWidget *CableContainer::getCable(int cableId) {
+	for (Widget *w : children) {
+		CableWidget *cw = dynamic_cast<CableWidget*>(w);
+		assert(cw);
+		if (cw->cable->id == cableId)
+			return cw;
+	}
+	return NULL;
+}
+
 json_t *CableContainer::toJson() {
 	json_t *rootJ = json_array();
 	for (Widget *w : children) {
diff --git a/src/app/CableWidget.cpp b/src/app/CableWidget.cpp
index ef22fe98..8b0b03b4 100644
--- a/src/app/CableWidget.cpp
+++ b/src/app/CableWidget.cpp
@@ -99,7 +99,7 @@ bool CableWidget::isComplete() {
 	return outputPort && inputPort;
 }
 
-void CableWidget::setOutputPort(PortWidget *outputPort) {
+void CableWidget::setOutput(PortWidget *outputPort) {
 	this->outputPort = outputPort;
 	if (outputPort) {
 		assert(outputPort->type == PortWidget::OUTPUT);
@@ -108,7 +108,7 @@ void CableWidget::setOutputPort(PortWidget *outputPort) {
 	}
 }
 
-void CableWidget::setInputPort(PortWidget *inputPort) {
+void CableWidget::setInput(PortWidget *inputPort) {
 	this->inputPort = inputPort;
 	if (inputPort) {
 		assert(inputPort->type == PortWidget::INPUT);
@@ -145,7 +145,7 @@ json_t *CableWidget::toJson() {
 	assert(isComplete());
 	json_t *rootJ = json_object();
 
-	// This is just here for fun. It is not used in fromJson()
+	// This is just here for fun. It is not used in fromJson(), since cableIds are not preserved across multiple launches of Rack.
 	json_object_set_new(rootJ, "id", json_integer(cable->id));
 
 	json_object_set_new(rootJ, "outputModuleId", json_integer(cable->outputModule->id));
@@ -177,19 +177,19 @@ void CableWidget::fromJson(json_t *rootJ, const std::map<int, ModuleWidget*> &mo
 	// Set ports
 	if (app()->patch->isLegacy(1)) {
 		// Before 0.6, the index of the "ports" array was the index of the PortWidget in the `outputs` and `inputs` vector.
-		setOutputPort(outputModule->outputs[outputId]);
-		setInputPort(inputModule->inputs[inputId]);
+		setOutput(outputModule->outputs[outputId]);
+		setInput(inputModule->inputs[inputId]);
 	}
 	else {
 		for (PortWidget *port : outputModule->outputs) {
 			if (port->portId == outputId) {
-				setOutputPort(port);
+				setOutput(port);
 				break;
 			}
 		}
 		for (PortWidget *port : inputModule->inputs) {
 			if (port->portId == inputId) {
-				setInputPort(port);
+				setInput(port);
 				break;
 			}
 		}
diff --git a/src/app/ModuleWidget.cpp b/src/app/ModuleWidget.cpp
index 788872b1..03e1f6ca 100644
--- a/src/app/ModuleWidget.cpp
+++ b/src/app/ModuleWidget.cpp
@@ -162,6 +162,16 @@ void ModuleWidget::draw(NVGcontext *vg) {
 		nvgFill(vg);
 	}
 
+	// if (module) {
+	// 	nvgBeginPath(vg);
+	// 	nvgRect(vg, 0, 0, 20, 20);
+	// 	nvgFillColor(vg, nvgRGBAf(0, 0, 0, 0.75));
+	// 	nvgFill(vg);
+
+	// 	std::string debugText = string::f("%d", module->id);
+	// 	bndLabel(vg, 0, 0, INFINITY, INFINITY, -1, debugText.c_str());
+	// }
+
 	// nvgResetScissor(vg);
 }
 
@@ -282,23 +292,6 @@ void ModuleWidget::setModule(Module *module) {
 	this->module = module;
 }
 
-void ModuleWidget::addInput(PortWidget *input) {
-	assert(input->type == PortWidget::INPUT);
-	inputs.push_back(input);
-	addChild(input);
-}
-
-void ModuleWidget::addOutput(PortWidget *output) {
-	assert(output->type == PortWidget::OUTPUT);
-	outputs.push_back(output);
-	addChild(output);
-}
-
-void ModuleWidget::addParam(ParamWidget *param) {
-	params.push_back(param);
-	addChild(param);
-}
-
 void ModuleWidget::setPanel(std::shared_ptr<SVG> svg) {
 	// Remove old panel
 	if (panel) {
@@ -316,6 +309,40 @@ void ModuleWidget::setPanel(std::shared_ptr<SVG> svg) {
 	}
 }
 
+void ModuleWidget::addParam(ParamWidget *param) {
+	params.push_back(param);
+	addChild(param);
+}
+
+void ModuleWidget::addOutput(PortWidget *output) {
+	assert(output->type == PortWidget::OUTPUT);
+	outputs.push_back(output);
+	addChild(output);
+}
+
+void ModuleWidget::addInput(PortWidget *input) {
+	assert(input->type == PortWidget::INPUT);
+	inputs.push_back(input);
+	addChild(input);
+}
+
+ParamWidget *ModuleWidget::getParam(int paramId) {
+	if (0 <= paramId && paramId < (int) params.size())
+		return params[paramId];
+	return NULL;
+}
+
+PortWidget *ModuleWidget::getOutput(int outputId) {
+	if (0 <= outputId && outputId < (int) outputs.size())
+		return outputs[outputId];
+	return NULL;
+}
+
+PortWidget *ModuleWidget::getInput(int inputId) {
+	if (0 <= inputId && inputId < (int) inputs.size())
+		return inputs[inputId];
+	return NULL;
+}
 
 json_t *ModuleWidget::toJson() {
 	json_t *rootJ = json_object();
diff --git a/src/app/PortWidget.cpp b/src/app/PortWidget.cpp
index 46d5d7d1..6466976f 100644
--- a/src/app/PortWidget.cpp
+++ b/src/app/PortWidget.cpp
@@ -2,6 +2,7 @@
 #include "app/Scene.hpp"
 #include "window.hpp"
 #include "app.hpp"
+#include "history.hpp"
 #include "componentlibrary.hpp"
 
 
@@ -60,6 +61,11 @@ void PortWidget::onButton(const event::Button &e) {
 	if (e.action == GLFW_PRESS && e.button == GLFW_MOUSE_BUTTON_RIGHT) {
 		CableWidget *cw = app()->scene->rackWidget->cableContainer->getTopCable(this);
 		if (cw) {
+			// history::CableRemove
+			history::CableRemove *h = new history::CableRemove;
+			h->setCable(cw);
+			app()->history->push(h);
+
 			app()->scene->rackWidget->cableContainer->removeCable(cw);
 			delete cw;
 		}
@@ -78,20 +84,25 @@ void PortWidget::onDragStart(const event::DragStart &e) {
 	}
 
 	if (cw) {
+		// history::CableRemove
+		history::CableRemove *h = new history::CableRemove;
+		h->setCable(cw);
+		app()->history->push(h);
+
 		// Disconnect and reuse existing cable
 		app()->scene->rackWidget->cableContainer->removeCable(cw);
 		if (type == OUTPUT)
-			cw->setOutputPort(NULL);
+			cw->setOutput(NULL);
 		else
-			cw->setInputPort(NULL);
+			cw->setInput(NULL);
 	}
 	else {
 		// Create a new cable
 		cw = new CableWidget;
 		if (type == OUTPUT)
-			cw->setOutputPort(this);
+			cw->setOutput(this);
 		else
-			cw->setInputPort(this);
+			cw->setInput(this);
 	}
 	app()->scene->rackWidget->cableContainer->setIncompleteCable(cw);
 }
@@ -102,6 +113,11 @@ void PortWidget::onDragEnd(const event::DragEnd &e) {
 	CableWidget *cw = app()->scene->rackWidget->cableContainer->releaseIncompleteCable();
 	if (cw->isComplete()) {
 		app()->scene->rackWidget->cableContainer->addCable(cw);
+
+		// history::CableAdd
+		history::CableAdd *h = new history::CableAdd;
+		h->setCable(cw);
+		app()->history->push(h);
 	}
 	else {
 		delete cw;
@@ -119,9 +135,9 @@ void PortWidget::onDragDrop(const event::DragDrop &e) {
 	if (cw) {
 		cw->hoveredOutputPort = cw->hoveredInputPort = NULL;
 		if (type == OUTPUT)
-			cw->setOutputPort(this);
+			cw->setOutput(this);
 		else
-			cw->setInputPort(this);
+			cw->setInput(this);
 	}
 }
 
diff --git a/src/history.cpp b/src/history.cpp
index 54e6eab4..3a1261e1 100644
--- a/src/history.cpp
+++ b/src/history.cpp
@@ -1,6 +1,7 @@
 #include "history.hpp"
 #include "app.hpp"
 #include "app/Scene.hpp"
+#include "engine/Cable.hpp"
 
 
 namespace rack {
@@ -109,6 +110,47 @@ void ParamChange::redo() {
 }
 
 
+void CableAdd::setCable(CableWidget *cw) {
+	assert(cw->cable);
+	assert(cw->cable->id > 0);
+	cableId = cw->cable->id;
+	assert(cw->cable->outputModule);
+	outputModuleId = cw->cable->outputModule->id;
+	outputId = cw->cable->outputId;
+	assert(cw->cable->inputModule);
+	inputModuleId = cw->cable->inputModule->id;
+	inputId = cw->cable->inputId;
+	color = cw->color;
+}
+
+void CableAdd::undo() {
+	CableWidget *cw = app()->scene->rackWidget->cableContainer->getCable(cableId);
+	app()->scene->rackWidget->cableContainer->removeCable(cw);
+	delete cw;
+}
+
+void CableAdd::redo() {
+	CableWidget *cw = new CableWidget;
+	cw->cable->id = cableId;
+
+	ModuleWidget *outputModule = app()->scene->rackWidget->getModule(outputModuleId);
+	assert(outputModule);
+	PortWidget *outputPort = outputModule->getOutput(outputId);
+	assert(outputPort);
+	cw->setOutput(outputPort);
+
+	ModuleWidget *inputModule = app()->scene->rackWidget->getModule(inputModuleId);
+	assert(inputModule);
+	PortWidget *inputPort = inputModule->getInput(inputId);
+	assert(inputPort);
+	cw->setInput(inputPort);
+
+	cw->color = color;
+
+	app()->scene->rackWidget->cableContainer->addCable(cw);
+}
+
+
 State::~State() {
 	for (Action *action : actions) {
 		delete action;