--- ray/src/hd/rhd_x11.c	1997/11/21 13:35:58	3.4
+++ ray/src/hd/rhd_x11.c	1997/11/21 16:10:17	3.6
@@ -212,6 +212,7 @@ int
 dev_input()			/* get X11 input */
 {
 	inpresflags = 0;
+
 	do
 		getevent();
 
@@ -474,17 +475,20 @@ register XKeyPressedEvent  *ekey;
 	case 'H':			/* turn off height motion lock */
 		headlocked = 0;
 		return;
-	case CTRL('Z'):
+	case CTRL('S'):
 	case 'p':			/* pause computation */
 		inpresflags |= DEV_WAIT;
 		return;
+	case CTRL('Q'):
 	case '\n':
-	case '\r':			/* release */
+	case '\r':			/* resume computation */
+		inpresflags |= DEV_RESUME;
 		return;
 	case CTRL('R'):			/* redraw */
+		qtCompost(100);			/* unload the old tree */
 		if (ncolors > 0)
 			new_ctab(ncolors);
-		qtRedraw(0, 0, odev.hres, odev.vres);
+		inpresflags |= DEV_REDRAW;	/* resend values from server */
 		return;
 	case CTRL('D'):
 	case 'Q':