diff --git a/app/src/main/java/ru/spbu/depnav/ui/component/MarkerCluster.kt b/app/src/main/java/ru/spbu/depnav/ui/component/MarkerCluster.kt
index acde468f..c26329b9 100644
--- a/app/src/main/java/ru/spbu/depnav/ui/component/MarkerCluster.kt
+++ b/app/src/main/java/ru/spbu/depnav/ui/component/MarkerCluster.kt
@@ -45,6 +45,7 @@ import ru.spbu.depnav.ui.theme.DEFAULT_PADDING
 /** Maximum size a marker cluster composable can have in each dimension. */
 val MAX_MARKER_CLUSTER_VIEW_SIZE = 50.dp
 
+/** Multiple markers clustered together. */
 @Composable
 fun MarkersCluster(
     markerIds: List<String>,
diff --git a/app/src/main/java/ru/spbu/depnav/utils/map/Clustering.kt b/app/src/main/java/ru/spbu/depnav/utils/map/Clustering.kt
index d9afd58b..e75327f5 100644
--- a/app/src/main/java/ru/spbu/depnav/utils/map/Clustering.kt
+++ b/app/src/main/java/ru/spbu/depnav/utils/map/Clustering.kt
@@ -38,6 +38,7 @@ private const val ELEVATOR_CLUSTERER_ID = "elevators"
 private const val WC_CLUSTERER_ID = "wcs"
 private const val OTHER_CLUSTERER_ID = "others"
 
+/** Adds clusterers for each marker type group. */
 @OptIn(ExperimentalClusteringApi::class)
 fun MapState.addClusterers() {
     val clusterAlphaState = derivedStateOf { getMarkerAlpha() }
@@ -83,6 +84,7 @@ private fun createClusterFactory(alphaState: State<Float>, type: Marker.MarkerTy
         }
     }
 
+/** Returns ID of the clustersr responsible for the specified marker type. */
 fun getClustererId(markerType: Marker.MarkerType) = when (markerType) {
     Marker.MarkerType.ROOM -> ROOMS_CLUSTERER_ID
     Marker.MarkerType.ENTRANCE -> ENTRANCE_CLUSTERER_ID
diff --git a/app/src/main/java/ru/spbu/depnav/utils/map/MarkerAlpha.kt b/app/src/main/java/ru/spbu/depnav/utils/map/MarkerAlpha.kt
index e2ef8f67..a6d36654 100644
--- a/app/src/main/java/ru/spbu/depnav/utils/map/MarkerAlpha.kt
+++ b/app/src/main/java/ru/spbu/depnav/utils/map/MarkerAlpha.kt
@@ -8,6 +8,7 @@ import ovh.plrapps.mapcompose.ui.state.MapState
 private const val MARKERS_INVISIBLE_UNTIL_SCALE = 0.2f
 private const val MARKERS_FULLY_VISIBLE_FROM_SCALE = 0.5f
 
+/** Returns alpha value to use for map markers calculated based on the current map scale. */
 fun MapState.getMarkerAlpha(): Float {
     val minScale = minScale.coerceAtLeast(MARKERS_INVISIBLE_UNTIL_SCALE)
     val maxScale = maxScale.coerceAtMost(MARKERS_FULLY_VISIBLE_FROM_SCALE)