diff --git a/README.md b/README.md
index c4b01b5..62ed8f3 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
+[![Build Status](https://travis-ci.org/rricharz/Tek4010.svg?branch=master)](https://travis-ci.org/rricharz/Tek4010)
+
 # Tektronix 4010 and 4014 Terminal Emulator
 
 This is a [Tektronix 4010 and 4014](https://en.wikipedia.org/wiki/Tektronix_4010) terminal emulator
@@ -137,10 +139,11 @@ keys frequently to avoid to get a mess on the screen, as on a real Tektronix 401
 The hardcopy function on the Tektronix 4010 is emulated with a screen dump.
 
 	control-w	Make a screen dump in current directory using scrot
+                        Can be typed on the keyboard or sent by the computer during alpha mode
 
 You can also use the following control key function to close tek4010:
 
-	control-q	Close tek4010 window and quit tek4010
+	control-q	Close tek4010 window and quit tek4010.
 
 **Login into the system running simh (same or different Raspberry Pi)**
 
diff --git a/main.c b/main.c
index 55220dc..ebdbcb7 100644
--- a/main.c
+++ b/main.c
@@ -149,7 +149,7 @@ static void on_key_press(GtkWidget *widget, GdkEventKey *event, gpointer user_da
                         system("scrot --focussed");
                         return;
                 }
-                else if (event->keyval == 0x0071) { // "<ctrl>q" makes screendump
+                else if (event->keyval == 0x0071) { // "<ctrl>q" quits tek4010
                         on_quit_event();
                         return;
                 }
diff --git a/tek4010 b/tek4010
index 7c30fcc..b67422b 100755
Binary files a/tek4010 and b/tek4010 differ
diff --git a/tek4010.c b/tek4010.c
index c796c45..3f3991a 100755
--- a/tek4010.c
+++ b/tek4010.c
@@ -963,6 +963,9 @@ void tek4010_draw(cairo_t *cr, cairo_t *cr2, int first)
                                 case 13:    // return
                                             mode = 0; x0 = leftmargin;
                                             break;
+                                case 23:    // ctrl-w  screen dump
+                                            system("scrot --focussed");
+                                            break;
                                 case 28:    // file separator  >> point plot mode
                                             mode = 5;
                                             plotPointMode= 1;