diff --git a/README.md b/README.md
index 434dea40..dbddf3f7 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # DataForge Plugins for Visualisation
 
-This repository contains [DataForge](http://www.inr.ru/~nozik/dataforge/) 
+This repository contains [DataForge](http://npm.mipt.ru/dataforge/) 
 (also [here](https://github.com/mipt-npm/dataforge-core)) components useful for visualization in
 various scientific applications. Currently, the main application is 3D visualization for accelerator 
 experiments.
diff --git a/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/AbstractVisualGroup.kt b/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/AbstractVisualGroup.kt
index fda6c7fc..ca100ac8 100644
--- a/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/AbstractVisualGroup.kt
+++ b/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/AbstractVisualGroup.kt
@@ -8,7 +8,7 @@ import kotlinx.serialization.Transient
 
 
 /**
- * Abstract implementation of group of [VisualObject]
+ * Abstract implementation of mutable group of [VisualObject]
  */
 abstract class AbstractVisualGroup : AbstractVisualObject(), MutableVisualGroup {
 
@@ -60,6 +60,7 @@ abstract class AbstractVisualGroup : AbstractVisualObject(), MutableVisualGroup
         }
     }
 
+    // TODO Consider renaming to `StructureChangeListener` (singular)
     private data class StructureChangeListeners(val owner: Any?, val callback: (Name, VisualObject?) -> Unit)
 
     @Transient
diff --git a/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/AbstractVisualObject.kt b/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/AbstractVisualObject.kt
index 01e2c770..12043a27 100644
--- a/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/AbstractVisualObject.kt
+++ b/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/AbstractVisualObject.kt
@@ -12,6 +12,9 @@ internal data class PropertyListener(
     val action: (name: Name, oldItem: MetaItem<*>?, newItem: MetaItem<*>?) -> Unit
 )
 
+/**
+ * Abstract implementation of [VisualObject]
+ */
 abstract class AbstractVisualObject : VisualObject {
 
     @Transient
@@ -19,6 +22,9 @@ abstract class AbstractVisualObject : VisualObject {
 
     abstract override var properties: Config?
 
+    /**
+     * Style(s) of the object
+     */
     override var style: List<String>
         get() = properties?.let { it[STYLE_KEY].stringList } ?: emptyList()
         set(value) {
diff --git a/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/Colors.kt b/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/Colors.kt
index 1f42d87c..2e77fa45 100644
--- a/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/Colors.kt
+++ b/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/Colors.kt
@@ -3,7 +3,8 @@ package hep.dataforge.vis.common
 import kotlin.math.max
 
 /**
- * Taken from https://github.com/markaren/three.kt/blob/master/threejs-wrapper/src/main/kotlin/info/laht/threekt/math/ColorConstants.kt
+ * Definitions of common colors. Taken from
+ * https://github.com/markaren/three.kt/blob/master/threejs-wrapper/src/main/kotlin/info/laht/threekt/math/ColorConstants.kt
  */
 object Colors {
     const val aliceblue = 0xF0F8FF
@@ -177,11 +178,17 @@ object Colors {
     const val yellow = 0xFFFF00
     const val yellowgreen = 0x9ACD32
 
+    /**
+     * Convert Int color to string of format #rrggbb
+     */
     fun rgbToString(rgb: Int): String {
         val string = rgb.toString(16).padStart(6, '0')
         return "#" + string.substring(max(0, string.length - 6))
     }
 
+    /**
+     * Convert three bytes representing color to string of format #rrggbb
+     */
     fun rgbToString(red: UByte, green: UByte, blue: UByte): String {
         fun colorToString(color: UByte): String{
             return color.toString(16).padStart(2,'0')
diff --git a/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/MutableVisualGroup.kt b/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/MutableVisualGroup.kt
index f3b1ca7d..8aa3e8d5 100644
--- a/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/MutableVisualGroup.kt
+++ b/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/MutableVisualGroup.kt
@@ -4,6 +4,9 @@ import hep.dataforge.meta.Meta
 import hep.dataforge.names.*
 import hep.dataforge.provider.Provider
 
+/**
+ * Represents a group of [VisualObject] instances
+ */
 interface VisualGroup : Provider, Iterable<VisualObject>, VisualObject {
     /**
      * A map of top level named children
@@ -52,6 +55,9 @@ interface VisualGroup : Provider, Iterable<VisualObject>, VisualObject {
     }
 }
 
+/**
+ * Mutable version of [VisualGroup]
+ */
 interface MutableVisualGroup : VisualGroup {
 
     /**
diff --git a/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/VisualObject.kt b/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/VisualObject.kt
index 4a5ce8b3..93f368a4 100644
--- a/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/VisualObject.kt
+++ b/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/VisualObject.kt
@@ -67,9 +67,19 @@ interface VisualObject : MetaRepr, Configurable {
     }
 }
 
+/**
+ * Get [VisualObject] property using key as a String
+ */
 fun VisualObject.getProperty(key: String, inherit: Boolean = true): MetaItem<*>? = getProperty(key.toName(), inherit)
+
+/**
+ * Set [VisualObject] property using key as a String
+ */
 fun VisualObject.setProperty(key: String, value: Any?) = setProperty(key.toName(), value)
 
+/**
+ *  Apply style to [VisualObject] by adding it to the [style] list
+ */
 fun VisualObject.applyStyle(name: String) {
     style = style + name
 }
\ No newline at end of file
diff --git a/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/valueWidget.kt b/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/valueWidget.kt
index fb4d5f32..8c45686f 100644
--- a/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/valueWidget.kt
+++ b/dataforge-vis-common/src/commonMain/kotlin/hep/dataforge/vis/common/valueWidget.kt
@@ -3,12 +3,18 @@ package hep.dataforge.vis.common
 import hep.dataforge.descriptors.ValueDescriptor
 import hep.dataforge.meta.*
 
+/**
+ * Extension property to access the "widget" key of [ValueDescriptor]
+ */
 var ValueDescriptor.widget: Meta
     get() = this.config["widget"].node?: EmptyMeta
     set(value) {
         this.config["widget"] = value
     }
 
+/**
+ * Extension property to access the "widget.type" key of [ValueDescriptor]
+ */
 var ValueDescriptor.widgetType: String?
     get() = this["widget.type"].string
     set(value) {
diff --git a/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/Extruded.kt b/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/Extruded.kt
index 32e8082d..6ae1f917 100644
--- a/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/Extruded.kt
+++ b/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/Extruded.kt
@@ -62,7 +62,7 @@ class Extruded(
     override fun <T : Any> toGeometry(geometryBuilder: GeometryBuilder<T>) {
         val shape: Shape2D = shape
 
-        if (shape.size < 3) error("Extruded shape requires more than points per layer")
+        if (shape.size < 3) error("Extruded shape requires more than 2 points per layer")
 
         /**
          * Expand the shape for specific layers
diff --git a/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/VisualGroup3D.kt b/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/VisualGroup3D.kt
index d960cfc7..7cea1f28 100644
--- a/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/VisualGroup3D.kt
+++ b/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/VisualGroup3D.kt
@@ -27,6 +27,9 @@ import kotlinx.serialization.Serializable
 import kotlinx.serialization.UseSerializers
 import kotlin.collections.set
 
+/**
+ * Represents 3-dimensional Visual Group
+ */
 @Serializable
 class VisualGroup3D : AbstractVisualGroup(), VisualObject3D {
     /**
diff --git a/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/VisualObject3D.kt b/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/VisualObject3D.kt
index cd9b22b3..0410677e 100644
--- a/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/VisualObject3D.kt
+++ b/dataforge-vis-spatial/src/commonMain/kotlin/hep/dataforge/vis/spatial/VisualObject3D.kt
@@ -14,6 +14,9 @@ import hep.dataforge.vis.spatial.VisualObject3D.Companion.SELECTED_KEY
 import hep.dataforge.vis.spatial.VisualObject3D.Companion.VISIBLE_KEY
 import kotlinx.serialization.UseSerializers
 
+/**
+ * Interface for 3-dimensional [VisualObject]
+ */
 interface VisualObject3D : VisualObject {
     var position: Point3D?
     var rotation: Point3D?
diff --git a/dataforge-vis-spatial/src/jsMain/kotlin/hep/dataforge/vis/spatial/three/ThreeCompositeFactory.kt b/dataforge-vis-spatial/src/jsMain/kotlin/hep/dataforge/vis/spatial/three/ThreeCompositeFactory.kt
index b6ee8852..8b88208d 100644
--- a/dataforge-vis-spatial/src/jsMain/kotlin/hep/dataforge/vis/spatial/three/ThreeCompositeFactory.kt
+++ b/dataforge-vis-spatial/src/jsMain/kotlin/hep/dataforge/vis/spatial/three/ThreeCompositeFactory.kt
@@ -6,7 +6,7 @@ import info.laht.threekt.core.BufferGeometry
 import info.laht.threekt.objects.Mesh
 
 /**
- * This should be inner, becaulse it uses object builder
+ * This should be inner, because it uses object builder
  */
 class ThreeCompositeFactory(val three: ThreePlugin) : MeshThreeFactory<Composite>(Composite::class) {
 
diff --git a/dataforge-vis-spatial/src/jsMain/kotlin/hep/dataforge/vis/spatial/three/csg.kt b/dataforge-vis-spatial/src/jsMain/kotlin/hep/dataforge/vis/spatial/three/csg.kt
index fa9a1c5b..036f729a 100644
--- a/dataforge-vis-spatial/src/jsMain/kotlin/hep/dataforge/vis/spatial/three/csg.kt
+++ b/dataforge-vis-spatial/src/jsMain/kotlin/hep/dataforge/vis/spatial/three/csg.kt
@@ -16,6 +16,9 @@ import info.laht.threekt.math.Matrix4
 import info.laht.threekt.math.Vector3
 import info.laht.threekt.objects.Mesh
 
+/**
+ * Constructive Solid Geometry
+ */
 open external class CSG {
     open var polygons: Array<Polygon>
     open fun clone(): CSG