diff --git a/doc/NERD_tree.txt b/doc/NERD_tree.txt
index 7fba2c9..229431f 100644
--- a/doc/NERD_tree.txt
+++ b/doc/NERD_tree.txt
@@ -744,7 +744,7 @@ Default: 0.
 
 If this option is set to 1 then the bookmarks table will be displayed.
 
-This option can be toggled dynamically with the |NERDTree-B| mapping.
+This option can be toggled dynamically, per tree, with the |NERDTree-B| mapping.
 
 ------------------------------------------------------------------------------
                                                            *NERDTreeShowFiles*
@@ -754,9 +754,9 @@ Default: 1.
 If this option is set to 1 then files are displayed in the NERD tree. If it is
 set to 0 then only directories are displayed.
 
-This option can be toggled dynamically with the |NERDTree-F| mapping and is
-useful for drastically shrinking the tree when you are navigating to a
-different part of the tree.
+This option can be toggled dynamically, per tree, with the |NERDTree-F|
+mapping and is useful for drastically shrinking the tree when you are
+navigating to a different part of the tree.
 
 ------------------------------------------------------------------------------
                                                           *NERDTreeShowHidden*
@@ -764,8 +764,8 @@ Values: 0 or 1.
 Default: 0.
 
 This option tells vim whether to display hidden files by default. This option
-can be dynamically toggled with the |NERDTree-H| mapping.
-Use one of the follow lines to set this option: >
+can be dynamically toggled, per tree, with the |NERDTree-H| mapping.  Use one
+of the follow lines to set this option: >
     let NERDTreeShowHidden=0
     let NERDTreeShowHidden=1
 <
@@ -884,6 +884,9 @@ fridge for later ;)
       NERDTreeQuitOnOpen.
     - optimised the nerd tree rendering. Now it takes just over 1/3 of the time
       it previously took to render.
+    - now the tree filter mappings toggle the filters "per tree" rather than
+      globally. The global filter variables are used to set the initial filter
+      settings for each new NERD tree.
     - fix to window resizing when opening a file when NERD tree is the only
       window open