diff --git a/src/ol/control/attributioncontrol.js b/src/ol/control/attributioncontrol.js
index 037fbff346..3e64e77c10 100644
--- a/src/ol/control/attributioncontrol.js
+++ b/src/ol/control/attributioncontrol.js
@@ -210,6 +210,7 @@ ol.control.Attribution.prototype.getSourceAttributions = function(frameState) {
 
 
 /**
+ * Update the attribution element.
  * @param {ol.MapEvent} mapEvent Map event.
  * @this {ol.control.Attribution}
  * @api
@@ -365,6 +366,7 @@ ol.control.Attribution.prototype.handleToggle_ = function() {
 
 
 /**
+ * Return `true` if the attribution is collapsible, `false` otherwise.
  * @return {boolean} True if the widget is collapsible.
  * @api stable
  */
@@ -374,6 +376,7 @@ ol.control.Attribution.prototype.getCollapsible = function() {
 
 
 /**
+ * Set whether the attribution should be collapsible.
  * @param {boolean} collapsible True if the widget is collapsible.
  * @api stable
  */
@@ -390,6 +393,9 @@ ol.control.Attribution.prototype.setCollapsible = function(collapsible) {
 
 
 /**
+ * Collapse or expand the attribution according to the passed parameter. Will
+ * not do anything if the attribution isn't collapsible or if the current
+ * collapsed state is already the one requested.
  * @param {boolean} collapsed True if the widget is collapsed.
  * @api stable
  */
@@ -402,6 +408,8 @@ ol.control.Attribution.prototype.setCollapsed = function(collapsed) {
 
 
 /**
+ * Return `true` when the attribution is currently collapsed or `false`
+ * otherwise.
  * @return {boolean} True if the widget is collapsed.
  * @api stable
  */
diff --git a/src/ol/control/mousepositioncontrol.js b/src/ol/control/mousepositioncontrol.js
index e39412babd..f6a54d9193 100644
--- a/src/ol/control/mousepositioncontrol.js
+++ b/src/ol/control/mousepositioncontrol.js
@@ -103,6 +103,7 @@ goog.inherits(ol.control.MousePosition, ol.control.Control);
 
 
 /**
+ * Update the mouseposition element.
  * @param {ol.MapEvent} mapEvent Map event.
  * @this {ol.control.MousePosition}
  * @api
@@ -130,6 +131,8 @@ ol.control.MousePosition.prototype.handleProjectionChanged_ = function() {
 
 
 /**
+ * Return the coordinate format type used to render the current position or
+ * undefined.
  * @return {ol.CoordinateFormatType|undefined} The format to render the current
  *     position in.
  * @observable
@@ -142,6 +145,7 @@ ol.control.MousePosition.prototype.getCoordinateFormat = function() {
 
 
 /**
+ * Return the projection that is used to report the mouse position.
  * @return {ol.proj.Projection|undefined} The projection to report mouse
  *     position in.
  * @observable
@@ -193,6 +197,7 @@ ol.control.MousePosition.prototype.setMap = function(map) {
 
 
 /**
+ * Set the coordinate format type used to render the current position.
  * @param {ol.CoordinateFormatType} format The format to render the current
  *     position in.
  * @observable
@@ -204,6 +209,7 @@ ol.control.MousePosition.prototype.setCoordinateFormat = function(format) {
 
 
 /**
+ * Set the projection that is used to report the mouse position.
  * @param {ol.proj.Projection} projection The projection to report mouse
  *     position in.
  * @observable
diff --git a/src/ol/control/overviewmapcontrol.js b/src/ol/control/overviewmapcontrol.js
index 66b5d9b616..aede825f0f 100644
--- a/src/ol/control/overviewmapcontrol.js
+++ b/src/ol/control/overviewmapcontrol.js
@@ -244,6 +244,7 @@ ol.control.OverviewMap.prototype.handleRotationChanged_ = function() {
 
 
 /**
+ * Update the overview map element.
  * @param {ol.MapEvent} mapEvent Map event.
  * @this {ol.control.OverviewMap}
  * @api
@@ -479,6 +480,7 @@ ol.control.OverviewMap.prototype.handleToggle_ = function() {
 
 
 /**
+ * Return `true` if the overview map is collapsible, `false` otherwise.
  * @return {boolean} True if the widget is collapsible.
  * @api stable
  */
@@ -488,6 +490,7 @@ ol.control.OverviewMap.prototype.getCollapsible = function() {
 
 
 /**
+ * Set whether the overview map should be collapsible.
  * @param {boolean} collapsible True if the widget is collapsible.
  * @api stable
  */
@@ -504,6 +507,9 @@ ol.control.OverviewMap.prototype.setCollapsible = function(collapsible) {
 
 
 /**
+ * Collapse or expand the overview map according to the passed parameter. Will
+ * not do anything if the overview map isn't collapsible or if the current
+ * collapsed state is already the one requested.
  * @param {boolean} collapsed True if the widget is collapsed.
  * @api stable
  */
diff --git a/src/ol/control/rotatecontrol.js b/src/ol/control/rotatecontrol.js
index 785380217b..881587481b 100644
--- a/src/ol/control/rotatecontrol.js
+++ b/src/ol/control/rotatecontrol.js
@@ -148,6 +148,7 @@ ol.control.Rotate.prototype.resetNorth_ = function() {
 
 
 /**
+ * Update the rotate control element.
  * @param {ol.MapEvent} mapEvent Map event.
  * @this {ol.control.Rotate}
  * @api
diff --git a/src/ol/control/scalelinecontrol.js b/src/ol/control/scalelinecontrol.js
index cf5eeb1e49..66e1ef499a 100644
--- a/src/ol/control/scalelinecontrol.js
+++ b/src/ol/control/scalelinecontrol.js
@@ -141,6 +141,7 @@ ol.control.ScaleLine.LEADING_DIGITS = [1, 2, 5];
 
 
 /**
+ * Return the units to use in the scale line.
  * @return {ol.control.ScaleLineUnits|undefined} The units to use in the scale
  *     line.
  * @observable
@@ -153,6 +154,7 @@ ol.control.ScaleLine.prototype.getUnits = function() {
 
 
 /**
+ * Update the scale line element.
  * @param {ol.MapEvent} mapEvent Map event.
  * @this {ol.control.ScaleLine}
  * @api
@@ -177,6 +179,7 @@ ol.control.ScaleLine.prototype.handleUnitsChanged_ = function() {
 
 
 /**
+ * Set the units to use in the scale line.
  * @param {ol.control.ScaleLineUnits} units The units to use in the scale line.
  * @observable
  * @api stable
diff --git a/src/ol/control/zoomslidercontrol.js b/src/ol/control/zoomslidercontrol.js
index 71847f1f68..c695e22821 100644
--- a/src/ol/control/zoomslidercontrol.js
+++ b/src/ol/control/zoomslidercontrol.js
@@ -175,6 +175,7 @@ ol.control.ZoomSlider.prototype.initSlider_ = function() {
 
 
 /**
+ * Update the zoomslider element.
  * @param {ol.MapEvent} mapEvent Map event.
  * @this {ol.control.ZoomSlider}
  * @api
diff --git a/src/ol/events/condition.js b/src/ol/events/condition.js
index 1141a64256..de8c3d20fe 100644
--- a/src/ol/events/condition.js
+++ b/src/ol/events/condition.js
@@ -19,6 +19,9 @@ ol.events.ConditionType;
 
 
 /**
+ * Return `true` if only the alt-key is pressed, `false` otherwise (e.g. when
+ * additionally the shift-key is pressed).
+ *
  * @param {ol.MapBrowserEvent} mapBrowserEvent Map browser event.
  * @return {boolean} True if only the alt key is pressed.
  * @api stable
@@ -33,6 +36,9 @@ ol.events.condition.altKeyOnly = function(mapBrowserEvent) {
 
 
 /**
+ * Return `true` if only the alt-key and shift-key is pressed, `false` otherwise
+ * (e.g. when additionally the platform-modifier-key is pressed).
+ *
  * @param {ol.MapBrowserEvent} mapBrowserEvent Map browser event.
  * @return {boolean} True if only the alt and shift keys are pressed.
  * @api stable
@@ -47,7 +53,8 @@ ol.events.condition.altShiftKeysOnly = function(mapBrowserEvent) {
 
 
 /**
- * Always true.
+ * Return always true.
+ *
  * @param {ol.MapBrowserEvent} mapBrowserEvent Map browser event.
  * @return {boolean} True.
  * @function
@@ -57,6 +64,8 @@ ol.events.condition.always = goog.functions.TRUE;
 
 
 /**
+ * Return `true` if the event is a `click` event, `false` otherwise.
+ *
  * @param {ol.MapBrowserEvent} mapBrowserEvent Map browser event.
  * @return {boolean} True if the event is a map `click` event.
  * @api stable
@@ -67,7 +76,8 @@ ol.events.condition.click = function(mapBrowserEvent) {
 
 
 /**
- * Always false.
+ * Return always false.
+ *
  * @param {ol.MapBrowserEvent} mapBrowserEvent Map browser event.
  * @return {boolean} False.
  * @function
@@ -77,6 +87,9 @@ ol.events.condition.never = goog.functions.FALSE;
 
 
 /**
+ * Return `true` if the browser event is a `pointermove` event, `false`
+ * otherwise.
+ *
  * @param {ol.MapBrowserEvent} mapBrowserEvent Map browser event.
  * @return {boolean} True if the browser event is a `pointermove` event.
  * @api
@@ -87,6 +100,8 @@ ol.events.condition.pointerMove = function(mapBrowserEvent) {
 
 
 /**
+ * Return `true` if the event is a map `singleclick` event, `false` otherwise.
+ *
  * @param {ol.MapBrowserEvent} mapBrowserEvent Map browser event.
  * @return {boolean} True if the event is a map `singleclick` event.
  * @api stable
@@ -97,6 +112,9 @@ ol.events.condition.singleClick = function(mapBrowserEvent) {
 
 
 /**
+ * Return `true` if no modifier key (alt-, shift- or platform-modifier-key) is
+ * pressed.
+ *
  * @param {ol.MapBrowserEvent} mapBrowserEvent Map browser event.
  * @return {boolean} True only if there no modifier keys are pressed.
  * @api stable
@@ -111,6 +129,9 @@ ol.events.condition.noModifierKeys = function(mapBrowserEvent) {
 
 
 /**
+ * Return `true` if only the platform-modifier-key (e.g. the windows-key) is
+ * pressed, `false` otherwise (e.g. when additionally the shift-key is pressed).
+ *
  * @param {ol.MapBrowserEvent} mapBrowserEvent Map browser event.
  * @return {boolean} True if only the platform modifier key is pressed.
  * @api stable
@@ -125,6 +146,9 @@ ol.events.condition.platformModifierKeyOnly = function(mapBrowserEvent) {
 
 
 /**
+ * Return `true` if only the shift-key is pressed, `false` otherwise (e.g. when
+ * additionally the alt-key is pressed).
+ *
  * @param {ol.MapBrowserEvent} mapBrowserEvent Map browser event.
  * @return {boolean} True if only the shift key is pressed.
  * @api stable
@@ -139,6 +163,9 @@ ol.events.condition.shiftKeyOnly = function(mapBrowserEvent) {
 
 
 /**
+ * Return `true` if the target element is not editable, i.e. not a `<input>`-,
+ * `<select>`- or `<textarea>`-element, `false` otherwise.
+ *
  * @param {ol.MapBrowserEvent} mapBrowserEvent Map browser event.
  * @return {boolean} True only if the target element is not editable.
  * @api
@@ -156,6 +183,8 @@ ol.events.condition.targetNotEditable = function(mapBrowserEvent) {
 
 
 /**
+ * Return `true` if the event originates from a mouse device.
+ *
  * @param {ol.MapBrowserEvent} mapBrowserEvent Map browser event.
  * @return {boolean} True if the event originates from a mouse device.
  * @api stable
diff --git a/src/ol/format/kmlformat.js b/src/ol/format/kmlformat.js
index 6bd5993d26..52cdfad2bc 100644
--- a/src/ol/format/kmlformat.js
+++ b/src/ol/format/kmlformat.js
@@ -1822,6 +1822,8 @@ ol.format.KML.prototype.readFeaturesFromNode = function(node, opt_options) {
 
 
 /**
+ * Read the name of the KML.
+ *
  * @param {Document|Node|string} source Souce.
  * @return {string|undefined} Name.
  * @api stable
@@ -1889,7 +1891,9 @@ ol.format.KML.prototype.readNameFromNode = function(node) {
 
 
 /**
- * @param {Document|Node|string} source Souce.
+ * Read the network links of the KML.
+ *
+ * @param {Document|Node|string} source Source.
  * @return {Array.<Object>} Network links.
  * @api
  */
diff --git a/src/ol/format/wfsformat.js b/src/ol/format/wfsformat.js
index 72540c29e3..e78e179b12 100644
--- a/src/ol/format/wfsformat.js
+++ b/src/ol/format/wfsformat.js
@@ -139,6 +139,8 @@ ol.format.WFS.prototype.readFeaturesFromNode = function(node, opt_options) {
 
 
 /**
+ * Read transaction response of the source.
+ *
  * @param {Document|Node|Object|string} source Source.
  * @return {ol.format.WFS.TransactionResponse|undefined} Transaction response.
  * @api stable
@@ -160,6 +162,8 @@ ol.format.WFS.prototype.readTransactionResponse = function(source) {
 
 
 /**
+ * Read feature collection metadata of the source.
+ *
  * @param {Document|Node|Object|string} source Source.
  * @return {ol.format.WFS.FeatureCollectionMetadata|undefined}
  *     FeatureCollection metadata.
@@ -617,6 +621,8 @@ ol.format.WFS.writeGetFeature_ = function(node, featureTypes, objectStack) {
 
 
 /**
+ * Encode format as WFS `GetFeature` and return the Node.
+ *
  * @param {olx.format.WFSWriteGetFeatureOptions} options Options.
  * @return {Node} Result.
  * @api stable
@@ -667,6 +673,8 @@ ol.format.WFS.prototype.writeGetFeature = function(options) {
 
 
 /**
+ * Encode format as WFS `Transaction` and return the Node.
+ *
  * @param {Array.<ol.Feature>} inserts The features to insert.
  * @param {Array.<ol.Feature>} updates The features to update.
  * @param {Array.<ol.Feature>} deletes The features to delete.
diff --git a/src/ol/format/wktformat.js b/src/ol/format/wktformat.js
index c252bd30cd..edde426c9c 100644
--- a/src/ol/format/wktformat.js
+++ b/src/ol/format/wktformat.js
@@ -18,6 +18,10 @@ goog.require('ol.geom.Polygon');
 
 
 /**
+ * @classdesc
+ * Geometry format for reading and writing data in the `WellKnownText` (WKT)
+ * format.
+ *
  * @constructor
  * @extends {ol.format.TextFeature}
  * @param {olx.format.WKTOptions=} opt_options Options.
diff --git a/src/ol/mapbrowserevent.js b/src/ol/mapbrowserevent.js
index b3cd8a3584..32baec1783 100644
--- a/src/ol/mapbrowserevent.js
+++ b/src/ol/mapbrowserevent.js
@@ -45,6 +45,7 @@ ol.MapBrowserEvent = function(type, map, browserEvent, opt_dragging,
   this.browserEvent = browserEvent;
 
   /**
+   * The original browser event.
    * @const
    * @type {Event}
    * @api stable
@@ -52,12 +53,14 @@ ol.MapBrowserEvent = function(type, map, browserEvent, opt_dragging,
   this.originalEvent = browserEvent.getBrowserEvent();
 
   /**
+   * The pixel of the original browser event.
    * @type {ol.Pixel}
    * @api stable
    */
   this.pixel = map.getEventPixel(this.originalEvent);
 
   /**
+   * The coordinate of the original browser event.
    * @type {ol.Coordinate}
    * @api stable
    */