diff --git a/src/Surfaces/SurfaceManager.cpp b/src/Surfaces/SurfaceManager.cpp
index e096c76..cf9e0a5 100644
--- a/src/Surfaces/SurfaceManager.cpp
+++ b/src/Surfaces/SurfaceManager.cpp
@@ -427,5 +427,17 @@ void SurfaceManager::setNextPreset(){
 	// TODO: Create command for this.
 }
 
+void SurfaceManager::setActivePreset(unsigned int i){
+	if(_presets.size() <= 1){
+		throw runtime_error("ofxPiMapper: No presets to set.");
+	}
+	
+	if(i >= _presets.size()){
+		throw runtime_error("ofxPiMapper: Preset index out of bounds.");
+	}
+	
+	_activePresetIndex = i;
+}
+
 } // namespace piMapper
 } // namespace ofx
diff --git a/src/Surfaces/SurfaceManager.h b/src/Surfaces/SurfaceManager.h
index 17b5bb9..e5ef5b9 100644
--- a/src/Surfaces/SurfaceManager.h
+++ b/src/Surfaces/SurfaceManager.h
@@ -71,12 +71,13 @@ class SurfaceManager {
 
 		void onVertexChanged(int & i);
 		void onVerticesChanged(vector<ofVec3f> & vertices);
-	
+
 		SurfaceStack * getActivePreset();
 		SurfaceStack * createPreset();
 		SurfaceStack * getPresetAt(unsigned int i);
 	
 		void setNextPreset();
+		void setActivePreset(unsigned int i);
 	
 	private:
 		BaseSurface * selectedSurface;
diff --git a/src/ofxPiMapper.cpp b/src/ofxPiMapper.cpp
index 734397d..510d620 100644
--- a/src/ofxPiMapper.cpp
+++ b/src/ofxPiMapper.cpp
@@ -22,6 +22,14 @@ void ofxPiMapper::registerFboSource(ofx::piMapper::FboSource * fboSource){
 	_application.addFboSource(fboSource);
 }
 
+void ofxPiMapper::setActivePreset(unsigned int i){
+	_application.getSurfaceManager()->setActivePreset(i);
+}
+
 bool ofxPiMapper::loadXmlSettings(string fileName){
 	return _application.loadXmlSettings(fileName);
-}
\ No newline at end of file
+}
+
+unsigned int ofxPiMapper::getNumPresets(){
+	return _application.getSurfaceManager()->getNumPresets();
+}
diff --git a/src/ofxPiMapper.h b/src/ofxPiMapper.h
index 5012daf..22bb2c1 100644
--- a/src/ofxPiMapper.h
+++ b/src/ofxPiMapper.h
@@ -27,8 +27,12 @@ class ofxPiMapper {
 	
 		void registerFboSource(ofx::piMapper::FboSource & fboSource);
 		void registerFboSource(ofx::piMapper::FboSource * fboSource);
+		void setActivePreset(unsigned int i);
+
 		bool loadXmlSettings(string fileName);
+	
+		unsigned int getNumPresets();
 
 	private:
 		ofx::piMapper::Application _application;
-};
\ No newline at end of file
+};