diff --git a/Slang/slang.js b/Slang/slang.js
index da02141..5aab6a7 100755
--- a/Slang/slang.js
+++ b/Slang/slang.js
@@ -546,45 +546,80 @@ var BOOTSTRAP = [
 '',
 '-------------------------------------------------------------------------------',
 '',
-'Basic words for block manipulation:',
+' Basic words for block manipulation:',
+'',
+' Get block length',
 '',
-'Get block length',
 '		[ 1 2 3 ] len',
-'	Result:',
-'		[ 1 2 3 ] 3',
+'				->	[ 1 2 3 ] 3',
+'',
+'',
+' Pop element form block tail',
 '',
-'Pop element form block tail',
 '		[ 1 2 3 ] pop',
-'	Result:',
-'		[ 1 2 ] 3',
+'				->	[ 1 2 ] 3',
+'',
+'',
+' Push element to block tail',
 '',
-'Push element to block tail',
 '		[ 1 2 3 ] 4 push',
-'	Result:',
-'		[ 1 2 3 4 ]',
+'				->	[ 1 2 3 4 ]',
 '',
-'NOTE: all indexes can be negative values, these will indicate the',
+'',
+' NOTE: all indexes can be negative values, these will indicate the',
 '	position relative to the tail, -1 being the last element.',
 '',
-'Get element at position (0)',
+' Get element at position (0)',
+'',
 '		[ 1 2 3 ] -1 at',
-'	Result:',
-'		[ 1 2 3 ] 3',
+'				->	[ 1 2 3 ] 3',
+'',
+'',
+' Put element (123) at position (0)',
 '',
-'Put element (123) at position (0)',
 '		[ 1 2 3 ] 123 0 to',
-'	Result:',
-'		[ 123 2 3 ]',
+'				->	[ 123 2 3 ]',
+'',
+'',
+' Put element (123) before position (0)',
 '',
-'Put element (123) before position (0)',
 '		[ 1 2 3 ] 123 0 before',
-'	Result:',
-'		[ 123 1 2 3 ]',
+'				->	[ 123 1 2 3 ]',
+'',
+'',
+' Like before but puts the element after position',
+'',
+'		[ 1 2 3 ] 123 0 after',
+'				->	[ 1 123 2 3 ]',
+'',
+'',
+' Expand block to stack -- "block 2 stack"',
 '',
-'Expand block to stack -- "block 2 stack"',
 '		[ 1 2 3 ] b2s',
-'	Result:',
-'		1 2 3',
+'				->	1 2 3',
+'',
+'',
+' Map a block/word to each element in a block',
+'',
+'		[ 1 2 3 ] [ 1 add ] map',
+'				->	[ 2 3 4 ]',
+
+' the returned value (stack) of the input block is put into the result',
+' block, this enables us to both remove (empty stack) and expand (more',
+' than one value) the resulting list...',
+'',
+'		[ 1 2 3 4 ] [ dup ] map',
+'				->	[ 1 1 2 2 3 3 4 4 ]',
+
+'		[ 1 2 3 4 ] [ dup 2 gt ? [ ] else [ . ] ] map',
+'				->	[ 3 4 ]',
+'',
+' this enables us to construct words like filter, which makes the code',
+' in the last example more readable:',
+'',
+'		[ 1 2 3 4 ] [ 2 gt ] filter',
+'				->	[ 3 4 ]',
+'',
 '',
 '',
 '-------------------------------------------------------------------------------',