diff -ur v8/fsyn.py v9/fsyn.py
--- v8/fsyn.py	2020-05-03 13:13:09.000000000 +0900
+++ v9/fsyn.py	2020-05-05 12:24:53.000000000 +0900
@@ -554,6 +554,9 @@
 		if do_checkout_clatest:
 			checkout( get_clatest() )
 
+	def tree():
+		nodes_tree( get_link, get_curr() )
+
 
 	return empty.new( locals() )
 
@@ -587,6 +590,75 @@
 	fsyn.checkout( id )
 
 
+def nodes_tree(get_link, curr):
+	def link_to_nodes(id, from_node=None):
+		link = get_link( id )
+		node = empty.new( id=id, from_=from_node, to=[] )
+		if link.to:
+			node.to = list( map( lambda id: link_to_nodes( id, node ), link.to ) )
+		return node
+
+	def get_tails(node):
+		if not node.to:
+			return [ node ]
+		return sum( map( get_tails, node.to ), [] )
+
+	def max_tail(node):
+		def len_from(node, from_node):
+			if node == from_node:
+				return 0
+			return len_from( node.from_, from_node ) + 1
+
+		return max( get_tails( node ), key=lambda tail: len_from( tail, node ) )
+
+	def get_lst(from_node, tail):
+		lst = [ tail ]
+		while tail != from_node:
+			tail = tail.from_
+			lst.insert( 0, tail )
+		return lst
+		
+	lsts = []
+
+	def add_lst(from_node, i=0):
+		tail = max_tail( from_node )
+		lst = get_lst( from_node, tail )
+		if lsts:
+			n = len( lsts[ 0 ] )
+			j = n - i - len( lst )
+			lst = [ None ] * i + lst + [ None ] * j
+		lsts.append( lst )
+
+		n = len( lst )
+		for i in reversed( range( n ) ):
+			node = lst[ i ]
+			if not node or len( node.to ) < 2:
+				continue
+			for to_node in node.to:
+				if to_node != lst[ i + 1 ]:
+					add_lst( to_node, i + 1 )
+
+	def show():
+		if not lsts:
+			return
+		zip_lsts = list( zip( *lsts ) )
+		n = len( zip_lsts )
+		for i in reversed( range( n ) ):
+			lst = zip_lsts[ i ]
+			for j in range( len( lst ) ):
+				node = lst[ j ]
+				if node:
+					s = '  ' * j + node.id
+					if node.id == curr:
+						s += '@' # curr
+					elif i == n - 1 or not lsts[ j ][ i + 1]:
+						s += '*' # tail
+					dbg.out( s )
+
+	org = link_to_nodes( 'org' )
+	add_lst( org )
+	show()
+
 if __name__ == "__main__":
 	cmds = [
 		arg.cmd_new( 'create' ),
@@ -606,6 +678,7 @@
 		arg.cmd_new( 'push', [ 'to_path' ] ),
 		arg.cmd_new( 'pull', [ 'from_path' ] ),
 		arg.cmd_new( 'clone', [ 'dot_fsyn_path' ], comment='ex. site/foo.fsyn' ),
+		arg.cmd_new( 'tree', comment='show id tree' ),
 	]
 	cmd = arg.get_name_args( cmds )