diff --git a/src/List/TreeList.php b/src/List/TreeList.php
index 792256e..33a7d09 100644
--- a/src/List/TreeList.php
+++ b/src/List/TreeList.php
@@ -14,6 +14,12 @@ use NoccyLabs\JsonEdit\Tree\ObjectNode;
 use NoccyLabs\JsonEdit\Tree\ValueNode;
 use Traversable;
 
+/**
+ * This class flattens a tree into a list that can be indexed and addressed.
+ * The path separated by slashes is used as the key, and the Entry wraps the
+ * Node in the tree.
+ * 
+ */
 class TreeList implements Countable, IteratorAggregate
 {
     /** @var array<string,Entry> */
@@ -21,7 +27,7 @@ class TreeList implements Countable, IteratorAggregate
 
     private const TREE_FOLD_OPEN = "\u{f0fe}";
     private const TREE_FOLD_CLOSE = "\u{f146}";
-    private const TREE_INDENT_GUIDE = "\u{258f} ";
+    private const TREE_INDENT_GUIDE = "\u{258e} ";
     private const TREE_INDENT = "  ";
 
     private const ICON_NUMERIC = "\u{f89f}";
@@ -34,11 +40,21 @@ class TreeList implements Countable, IteratorAggregate
     {
     }
 
+    /**
+     * Iterate over all visible nodes
+     *
+     * @return Traversable
+     */
     public function getIterator(): Traversable
     {
         return new ArrayIterator($this->list);
     }
 
+    /**
+     * Return the number of visible nodes
+     *
+     * @return int
+     */
     public function count(): int
     {
         return count($this->list);
@@ -134,6 +150,15 @@ class TreeList implements Countable, IteratorAggregate
         return null;
     }
 
+    /**
+     * Draw an entry to a row on the screen.
+     *
+     * @param int $screenRow
+     * @param int $entryRow
+     * @param int $columns
+     * @param bool $selected
+     * @return void
+     */
     public function drawEntry(int $screenRow, int $entryRow, int $columns, bool $selected): void
     {