diff --git a/src/UI/Timeline/AnimationTimeline.gd b/src/UI/Timeline/AnimationTimeline.gd
index 214d77b84..cde038f23 100644
--- a/src/UI/Timeline/AnimationTimeline.gd
+++ b/src/UI/Timeline/AnimationTimeline.gd
@@ -389,14 +389,8 @@ func _on_MoveRight_pressed() -> void:
 	Global.frame_hbox.get_child(frame).change_frame_order(1)
 
 
-func reverse_frames() -> void:
+func reverse_frames(indices := []) -> void:
 	var project = Global.current_project
-	var indices := []
-	for cel in Global.current_project.selected_cels:
-		var f: int = cel[0]
-		if not f in indices:
-			indices.append(f)
-	indices.sort()
 	project.undo_redo.create_action("Change Frame Order")
 	project.undo_redo.add_do_method(project, "reverse_frames", indices)
 	project.undo_redo.add_undo_method(project, "reverse_frames", indices)
diff --git a/src/UI/Timeline/FrameButton.gd b/src/UI/Timeline/FrameButton.gd
index 49e071ab4..3d46f86c0 100644
--- a/src/UI/Timeline/FrameButton.gd
+++ b/src/UI/Timeline/FrameButton.gd
@@ -70,28 +70,28 @@ func _button_pressed() -> void:
 		pressed = !pressed
 	elif Input.is_action_just_released("middle_mouse"):
 		pressed = !pressed
-		Global.animation_timeline.delete_frames()
+		Global.animation_timeline.delete_frames(_get_frame_indices())
 	else:  # An example of this would be Space
 		pressed = !pressed
 
 
 func _on_PopupMenu_id_pressed(id: int) -> void:
+	var indices := _get_frame_indices()
 	match id:
 		REMOVE:
-			Global.animation_timeline.delete_frames()
+			Global.animation_timeline.delete_frames(indices)
 		CLONE:
-			Global.animation_timeline.copy_frames()
+			Global.animation_timeline.copy_frames(indices)
 		MOVE_LEFT:
 			change_frame_order(-1)
 		MOVE_RIGHT:
 			change_frame_order(1)
 		PROPERTIES:
+			frame_properties.frame_indices = indices
 			frame_properties.popup_centered()
 			Global.dialog_open(true)
-			frame_properties.set_frame_label(frame)
-			frame_properties.set_frame_dur(Global.current_project.frames[frame].duration)
 		REVERSE:
-			Global.animation_timeline.reverse_frames()
+			Global.animation_timeline.reverse_frames(indices)
 
 
 func change_frame_order(rate: int) -> void:
@@ -178,3 +178,15 @@ func _get_region_rect(x_begin: float, x_end: float) -> Rect2:
 	rect.position.x += rect.size.x * x_begin
 	rect.size.x *= x_end - x_begin
 	return rect
+
+
+func _get_frame_indices() -> Array:
+	var indices := []
+	for cel in Global.current_project.selected_cels:
+		var f: int = cel[0]
+		if not f in indices:
+			indices.append(f)
+	indices.sort()
+	if not frame in indices:
+		indices = [frame]
+	return indices
diff --git a/src/UI/Timeline/FrameProperties.gd b/src/UI/Timeline/FrameProperties.gd
index e2cfc67af..f5687e69d 100644
--- a/src/UI/Timeline/FrameProperties.gd
+++ b/src/UI/Timeline/FrameProperties.gd
@@ -1,14 +1,19 @@
 extends ConfirmationDialog
 
+var frame_indices := []
 onready var frame_num = $VBoxContainer/GridContainer/FrameNum
 onready var frame_dur = $VBoxContainer/GridContainer/FrameTime
 
 
-func set_frame_label(frame: int) -> void:
-	frame_num.set_text(str(frame + 1))
-
-
-func set_frame_dur(duration: float) -> void:
+func _on_FrameProperties_about_to_show() -> void:
+	if frame_indices.size() == 0:
+		frame_num.set_text("")
+		return
+	if frame_indices.size() == 1:
+		frame_num.set_text(str(frame_indices[0] + 1))
+	else:
+		frame_num.set_text("[%s...%s]" % [frame_indices[0] + 1, frame_indices[-1] + 1])
+	var duration: float = Global.current_project.frames[frame_indices[0]].duration
 	frame_dur.set_value(duration)
 
 
@@ -16,24 +21,16 @@ func _on_FrameProperties_popup_hide() -> void:
 	Global.dialog_open(false)
 
 
-func _on_FrameProperties_confirmed():
-	var frame: int = int(frame_num.get_text()) - 1
-	var duration: float = frame_dur.get_value()
-	var new_duration = Global.current_project.frames[frame].duration
-	new_duration = duration
-
-	Global.current_project.undos += 1
-	Global.current_project.undo_redo.create_action("Change frame duration")
-
-	Global.current_project.undo_redo.add_do_property(
-		Global.current_project.frames[frame], "duration", new_duration
-	)
-	Global.current_project.undo_redo.add_undo_property(
-		Global.current_project.frames[frame],
-		"duration",
-		Global.current_project.frames[frame].duration
-	)
-
-	Global.current_project.undo_redo.add_do_method(Global, "undo_or_redo", false)
-	Global.current_project.undo_redo.add_undo_method(Global, "undo_or_redo", true)
-	Global.current_project.undo_redo.commit_action()
+func _on_FrameProperties_confirmed() -> void:
+	var project: Project = Global.current_project
+	var new_duration: float = frame_dur.get_value()
+	project.undos += 1
+	project.undo_redo.create_action("Change frame duration")
+	for frame in frame_indices:
+		project.undo_redo.add_do_property(project.frames[frame], "duration", new_duration)
+		project.undo_redo.add_undo_property(
+			project.frames[frame], "duration", project.frames[frame].duration
+		)
+	project.undo_redo.add_do_method(Global, "undo_or_redo", false)
+	project.undo_redo.add_undo_method(Global, "undo_or_redo", true)
+	project.undo_redo.commit_action()
diff --git a/src/UI/Timeline/FrameProperties.tscn b/src/UI/Timeline/FrameProperties.tscn
index f80ad452a..4ab3face8 100644
--- a/src/UI/Timeline/FrameProperties.tscn
+++ b/src/UI/Timeline/FrameProperties.tscn
@@ -65,5 +65,6 @@ value = 2.0
 allow_greater = true
 suffix = "x"
 
+[connection signal="about_to_show" from="." to="." method="_on_FrameProperties_about_to_show"]
 [connection signal="confirmed" from="." to="." method="_on_FrameProperties_confirmed"]
 [connection signal="popup_hide" from="." to="." method="_on_FrameProperties_popup_hide"]