diff --git a/primitiveCollections/src/main/java/org/lucares/collections/IntList.java b/primitiveCollections/src/main/java/org/lucares/collections/IntList.java
index d7baed0..9e83aa7 100644
--- a/primitiveCollections/src/main/java/org/lucares/collections/IntList.java
+++ b/primitiveCollections/src/main/java/org/lucares/collections/IntList.java
@@ -206,6 +206,9 @@ public final class IntList implements Serializable, Cloneable {
 
 	/**
 	 * Removes elements from the list.
+	 * <p>
+	 * This method does not release any memory. Call {@link #trim()} to free unused
+	 * memory.
 	 *
 	 * @param fromIndex
 	 *            index of the first element to remove
@@ -215,6 +218,7 @@ public final class IntList implements Serializable, Cloneable {
 	 *             if {@code fromIndex} or {@code toIndex} is negative, or if the
 	 *             range defined by {@code fromIndex} and {@code toIndex} is out of
 	 *             bounds
+	 * @see #trim()
 	 */
 	public void remove(final int fromIndex, final int toIndex) {
 
@@ -236,9 +240,13 @@ public final class IntList implements Serializable, Cloneable {
 
 	/**
 	 * Remove all elements that contained in the specified list.
+	 * <p>
+	 * This method does not release any memory. Call {@link #trim()} to free unused
+	 * memory.
 	 *
 	 * @param remove
 	 *            the elements to remove
+	 * @see #trim()
 	 */
 	public void removeAll(final IntList remove) {
 
@@ -255,6 +263,17 @@ public final class IntList implements Serializable, Cloneable {
 		index = insertPosition;
 	}
 
+	/**
+	 * Remove all elements that match the given predicate.
+	 * <p>
+	 * This method does not release any memory. Call {@link #trim()} to free unused
+	 * memory.
+	 *
+	 *
+	 * @param predicate
+	 *            the predicate
+	 * @see #trim()
+	 */
 	public void removeIf(final IntPredicate predicate) {
 
 		final int size = index;
@@ -273,9 +292,13 @@ public final class IntList implements Serializable, Cloneable {
 
 	/**
 	 * Retains all elements contained in the specified list.
+	 * <p>
+	 * This method does not release any memory. Call {@link #trim()} to free unused
+	 * memory.
 	 *
 	 * @param retain
 	 *            the elements to retain
+	 * @see #trim()
 	 */
 	public void retainAll(final IntList retain) {
 		final int size = index;