diff --git a/README.md b/README.md
index 9ad9e82..508280f 100644
--- a/README.md
+++ b/README.md
@@ -86,9 +86,17 @@ Add a new tab to the tab group and returns a `Tab` instance.
 * `active` (default: `false`): set this to `true` if you want to activate the tab once it is loaded. Otherwise you will need to call `tab.activate()`.
 * `ready`: a callback function to call once the tab is ready. The `Tab` instance is passed as the only parameter.
 
-#### `tabGroup.getTab(id)`
+#### `tabGroup.getTab(id, idIsPosition)`
 
-Retrieve an instance of `Tab` from its `id` (return `null` if not found).
+If `idIsPosition` is true `id` is passed to `tabGroup.getTabByPosition`. Otherwise, `id` is passed to `tabGroup.getTabById`.
+
+#### `tabGroup.getTabById(id)`
+
+Retrieve an instance of `Tab` from this `id` (return `null` if not found).
+
+#### `tabGroup.getTabByPosition(position)`
+
+Retrieve an instance of `Tab` from this `position` (return `null` if not found).
 
 #### `tabGroup.getActiveTab()`