diff --git a/include/app/Switch.hpp b/include/app/Switch.hpp
index ff5a94d4..55c7db59 100644
--- a/include/app/Switch.hpp
+++ b/include/app/Switch.hpp
@@ -7,7 +7,11 @@ namespace rack {
 namespace app {
 
 
-/** A ParamWidget that controls  */
+/** A ParamWidget that represents an integer.
+Increases by 1 each time it is clicked.
+When maxValue is reached, the next click resets to minValue.
+In momentary mode, the value is instead set to maxValue when the mouse is held and minValue when released.
+*/
 struct Switch : ParamWidget {
 	/** Return to original position when released */
 	bool momentary = false;
diff --git a/include/engine/Light.hpp b/include/engine/Light.hpp
index 2a2ba504..4bc385ad 100644
--- a/include/engine/Light.hpp
+++ b/include/engine/Light.hpp
@@ -35,7 +35,7 @@ struct Light {
 		}
 	}
 
-	/** Use `setSmoothBrightness(brightness, APP->engine->getSampleTime())` instead. */
+	/** Use `setSmoothBrightness(brightness, sampleTime * frames)` instead. */
 	DEPRECATED void setBrightnessSmooth(float brightness, float frames = 1.f) {
 		setSmoothBrightness(brightness, frames / 44100.f);
 	}
diff --git a/include/rack0.hpp b/include/rack0.hpp
index 64f2c4a1..d90d7caf 100644
--- a/include/rack0.hpp
+++ b/include/rack0.hpp
@@ -47,6 +47,12 @@ DEPRECATED inline float interpf(const float *p, float x) {return interpolateLine
 DEPRECATED inline void complexMult(float *cr, float *ci, float ar, float ai, float br, float bi) {complexMult(ar, ai, br, bi, cr, ci);}
 DEPRECATED inline void cmultf(float *cr, float *ci, float ar, float ai, float br, float bi) {return complexMult(ar, ai, br, bi, cr, ci);}
 
+////////////////////
+// string
+////////////////////
+
+#define stringf string::f
+
 ////////////////////
 // random
 ////////////////////
@@ -126,6 +132,15 @@ DEPRECATED TParamWidget *createParam(math::Vec pos, Module *module, int paramId,
 	return o;
 }
 
+template <class TParamWidget>
+DEPRECATED TParamWidget *createParamCentered(math::Vec pos, Module *module, int paramId, float minValue, float maxValue, float defaultValue) {
+	TParamWidget *o = createParamCentered<TParamWidget>(pos, module, paramId);
+	if (module) {
+		module->configParam(paramId, minValue, maxValue, defaultValue);
+	}
+	return o;
+}
+
 /** Use createInput() and createOutput() without the `type` variable */
 template <class TPortWidget>
 DEPRECATED TPortWidget *createPort(math::Vec pos, PortWidget::Type type, Module *module, int inputId) {