diff --git a/joy/gui/world.py b/joy/gui/world.py
index 098da9f..48cbbdd 100644
--- a/joy/gui/world.py
+++ b/joy/gui/world.py
@@ -130,9 +130,12 @@ class StackDisplayWorld(World):
 		if self.has(command) and self.check(command) == False:  # not in {True, None}:
 			return
 		# print('\njoy?', command)
-		print(command)
+		self.print_command(command)
 		super(StackDisplayWorld, self).interpret(command)
 
+	def print_command(self, command):
+		print(command)
+
 	def print_stack(self):
 		print('\n%s <-' % stack_to_string(self.stack))
 
@@ -164,7 +167,7 @@ class StackWorld(StackDisplayWorld):
 		self.viewer.update_stack(self.stack)
 
 	def print_stack(self):
-		# StackDisplayWorld.print_stack(self)
+		print('%s . ' % stack_to_string(self.stack), end='')
 		if self.viewer:
 			self.viewer.update_stack(self.stack)
 
diff --git a/joy/library.py b/joy/library.py
index 4caac57..775e67c 100644
--- a/joy/library.py
+++ b/joy/library.py
@@ -102,6 +102,7 @@ Ns = list(map(NumberStarJoyType, _R))
 Ss = list(map(StackStarJoyType, _R))
 
 
+# "sec": stack effect comment, like in Forth.
 sec0 = stack_effect(t1)()
 sec1 = stack_effect(s0, i1)(s1)
 sec2 = stack_effect(s0, i1)(a1)
@@ -113,6 +114,7 @@ sec_unary_logic = stack_effect(a1)(b1)
 sec_unary_math = stack_effect(n1)(n2)
 sec_Ns_math = stack_effect((Ns[1], s1),)(n0)
 
+# This is the main dict we're building.
 _dictionary = {}