diff --git a/display/graph.js b/display/graph.js
index f10a9bae1c1eaba3177f659b24970a28ca1d89bb..b36a0371446a1b89821c4267fd1e2a123a433075 100644
--- a/display/graph.js
+++ b/display/graph.js
@@ -12,7 +12,14 @@ import {
     CSS3DSprite,
 } from "three/examples/jsm/renderers/CSS3DRenderer.js";
 
+/**
+ * The main ForceGraph. Displays the graph and handles all connected events.
+ */
 class Graph {
+    /**
+     * Constructs a new Graph object.
+     * @param {string} dataUrl URL to a JSON object defining the graph structure.
+     */
     constructor(dataUrl) {
         this.graph = null;
         this.gData = null;
@@ -31,6 +38,12 @@ class Graph {
         this.loadGraph(dataUrl);
     }
 
+    /**
+     * Loads the graph by constructing a new ForceGraph3D object.
+     * Also fetches the JSON data from the given URL.
+     * @param {string} dataUrl URL to a JSON object defining the graph structure.
+     * @returns {Promise<void>}
+     */
     async loadGraph(dataUrl) {
         this.gData = await fetch(dataUrl).then((res) => res.json());
         this.graph = ForceGraph3D({
@@ -59,6 +72,10 @@ class Graph {
             .height(Helpers.getHeight());
     }
 
+    /**
+     * Initializes all component which are dependent on the graph data after the graph has finished loading
+     * (after it has computed its first tick.)
+     */
     initializeModel() {
         if (this.firstTick) {
             this.mapEdgeColors();
@@ -79,6 +96,11 @@ class Graph {
         }
     }
 
+    /**
+     * Returns the color of the given node as a string in the HTML rgb() format.
+     * @param node
+     * @returns {string} HTML rgb() string.
+     */
     getNodeColor(node) {
         return this.highlightNodes.has(node)
             ? node === this.hoverNode
@@ -98,6 +120,10 @@ class Graph {
         return this.highlightLinks.has(link) ? 2 : 0.8;
     }
 
+    /**
+     * Returns an array containing the different edge types of the graph.
+     * @returns {*[]}
+     */
     getLinkClasses() {
         const linkClasses = [];
         this.graph
@@ -202,6 +228,10 @@ class Graph {
         this.graph.graphData(data);
     }
 
+    /**
+     * Resets additional node values.
+     * @see updateNodeData
+     */
     resetNodeData() {
         const gData = this.graph.graphData();
         for (const node of gData.nodes) {
@@ -210,6 +240,10 @@ class Graph {
         }
     }
 
+    /**
+     * Updates the graph data structure to contain additional values.
+     * Creates a 'neighbors' and 'links' array for each node object.
+     */
     updateNodeData() {
         const gData = this.graph.graphData();
         // cross-link node objects
@@ -269,6 +303,9 @@ class Graph {
         this.graph.scene().add(mesh);
     }
 
+    /**
+     * Maps the colors of the color palette to the different edge types
+     */
     mapEdgeColors() {
         const linkClasses = this.getLinkClasses();
         for (let i = 0; i < linkClasses.length; i++) {
diff --git a/display/helpers.js b/display/helpers.js
index 459ec16c1de10c34f033023ac204c55fcb830b22..68684d34a0e7ebb413afcce6e899f2ed41adf962 100644
--- a/display/helpers.js
+++ b/display/helpers.js
@@ -1,18 +1,36 @@
 export { getWidth, getHeight, getCanvasDivNode, createDiv };
 
+/**
+ * Returns the maximum width that should be used if displaying elements inside of wordpress.
+ * @returns {number}
+ */
 function getWidth() {
     return document.getElementById("3d-graph").offsetWidth;
 }
 
+/**
+ * Returns the maximum height that should be used if displaying elements inside of wordpress.
+ * @returns {number}
+ */
 function getHeight() {
     return window.innerHeight - 200;
 }
 
+/**
+ * Returns the div node which encapsulates the canvas the 3d-force-graph is drawn on.
+ * @returns {ChildNode}
+ */
 function getCanvasDivNode() {
     const domNode = document.getElementById("3d-graph");
     return domNode.firstChild.firstChild.firstChild;
 }
 
+/**
+ * Creates a new div element.
+ * @param {string} className Class name of the new div element.
+ * @param {HTMLDivElement} parent Optional parent element of the new div.
+ * @returns {HTMLDivElement} The new div element.
+ */
 function createDiv(className, parent) {
     const node = document.createElement("div");
     node.className = className;
diff --git a/display/overlays/neighbors.js b/display/overlays/neighbors.js
index 0499788da39242a48615b352164aa22e576c1fdd..d7b253f971ffd0e6c3aa48f2b1acc08f9b710d37 100644
--- a/display/overlays/neighbors.js
+++ b/display/overlays/neighbors.js
@@ -4,18 +4,26 @@ import * as Config from "../../config";
 
 export { NodeNeighborOverlay };
 
+/**
+ * Displays an overlay showing the neighbors of a node divided by the link type
+ * that connects them.
+ */
 class NodeNeighborOverlay {
     constructor(graph, parentNode, infoOverlay) {
         this.graph = graph;
         this.parentNode = parentNode;
         this.infoOverlay = infoOverlay;
 
-        this.activeTabNav = null;
-        this.activeTabContent = null;
+        this.activeTabNav = null; // The currently selected tab handle
+        this.activeTabContent = null; // The currently selected tab content
 
         this.tabContentPages = {};
     }
 
+    /**
+     * Creates the visible elements of the overlay.
+     * Must be called after the graph has been initialized.
+     */
     create() {
         const bottomContainerDiv = Helpers.createDiv(
             "bottom-container",
@@ -84,12 +92,20 @@ class NodeNeighborOverlay {
         this.activeTabContent = this.tabContentPages[cls];
     }
 
+    /**
+     * Clears the images from all tab content pages.
+     */
     clearTabContentPages() {
         for (const page of Object.values(this.tabContentPages)) {
             jQuery(page).empty();
         }
     }
 
+    /**
+     * Creates a new image (with link) for the given target node.
+     * @param target
+     * @returns {HTMLDivElement}
+     */
     createReference(target) {
         const linkDiv = document.createElement("div");
         linkDiv.className = "link-img";
@@ -108,6 +124,10 @@ class NodeNeighborOverlay {
         return linkDiv;
     }
 
+    /**
+     * Updates all tabs to have content matching the given node.
+     * @param node
+     */
     updateTabs(node) {
         this.clearTabContentPages();
 
diff --git a/display/overlays/nodeinfo.js b/display/overlays/nodeinfo.js
index 18bd6791844329c3f8e6a490bd1008ecd38b94fa..c6f1f21655053eec129b66d3e7d50524ff3250ea 100644
--- a/display/overlays/nodeinfo.js
+++ b/display/overlays/nodeinfo.js
@@ -81,6 +81,10 @@ class NodeInfoOverlay {
         textArea.appendChild(description);
     }
 
+    /**
+     * Updates the overlay (and its children) to display information on the given node.
+     * @param node
+     */
     updateInfoOverlay(node) {
         jQuery("#infoOverlayHeadline").text(node.name);
         if ("image" in node) {