diff --git a/REFERENCE-0-preinstall.md b/REFERENCE-0-preinstall.md
index c19244f..4fbd2d7 100644
--- a/REFERENCE-0-preinstall.md
+++ b/REFERENCE-0-preinstall.md
@@ -10,6 +10,7 @@ Creates the btrfs subvolumes.
 # Functions
 * [mountallsubvol()](#mountallsubvol)
 * [subvolumesetup()](#subvolumesetup)
+* [formatandmount()](#formatandmount)
 
 
 ## mountallsubvol()
@@ -18,6 +19,8 @@ Mount all btrfs subvolumes after root has been mounted.
 
 ## subvolumesetup()
 
-BTRFS subvolulme creation and mounting. 
+BTRFS subvolulme creation and mounting.
 
+## formatandmount()
 
+Format and start mounting partitions.