diff --git a/button.go b/button.go
index f3c5763..f0b9f30 100644
--- a/button.go
+++ b/button.go
@@ -9,7 +9,7 @@ import (
 // A Button represents a clickable button with some text.
 type Button struct {
 	// Clicked gets a message when the button is clicked.
-	// You cannot change it once the Window containing the Button has been opened.
+	// You cannot change it once the Window containing the Button has been created.
 	// If you do not respond to this signal, nothing will happen.
 	Clicked	chan struct{}
 
diff --git a/stack.go b/stack.go
index 4bdede6..fc9d600 100644
--- a/stack.go
+++ b/stack.go
@@ -48,7 +48,7 @@ func NewVerticalStack(controls ...Control) *Stack {
 	return newStack(vertical, controls...)
 }
 
-// SetStretchy marks a control in a Stack as stretchy. This cannot be called once the Window containing the Stack has been opened.
+// SetStretchy marks a control in a Stack as stretchy. This cannot be called once the Window containing the Stack has been created.
 // It panics if index is out of range.
 func (s *Stack) SetStretchy(index int) {
 	s.lock.Lock()
diff --git a/window.go b/window.go
index b182f7c..58f0aca 100644
--- a/window.go
+++ b/window.go
@@ -10,7 +10,7 @@ import (
 // Window represents an on-screen window.
 type Window struct {
 	// Closing gets a message when the user clicks the window's close button.
-	// You cannot change it once the Window has been opened.
+	// You cannot change it once the Window has been created.
 	// If you do not respond to this signal, nothing will happen; regardless of whether you handle the signal or not, the window will not be closed.
 	Closing		chan struct{}