diff -r a75d8598f30a sys/src/cmd/rio/rio.c
--- a/sys/src/cmd/rio/rio.c	Mon Nov 02 19:12:15 2015 -0500
+++ b/sys/src/cmd/rio/rio.c	Tue Nov 03 09:31:20 2015 -0600
@@ -24,6 +24,7 @@
 void		move(void);
 void		delete(void);
 void		hide(void);
+void		label(void);
 void		unhide(int);
 void		newtile(int);
 Image	*sweep(void);
@@ -53,6 +54,7 @@
 	Move,
 	Delete,
 	Hide,
+	Label,
 	Exit,
 };
 
@@ -91,6 +93,7 @@
  [Move]		"Move",
  [Delete]		"Delete",
  [Hide]		"Hide",
+ [Label]	"Label",
  [Exit]		"Exit",
 			nil
 };
@@ -777,6 +780,9 @@
 	case Hide:
 		hide();
 		break;
+	case Label:
+		label();
+		break;
 	case Exit:
 		if(Hidden > Exit){
 			send(exitchan, nil);
@@ -1250,6 +1256,54 @@
 		}
 }
 
+void
+labelthread(void *a)
+{
+	Channel *c;
+	Rune r;
+	char *s;
+
+	c = a;
+	while((s = recvp(input->ck)) != nil){
+		if(*s == 'c'){
+			chartorune(&r, s+1);
+			if(r)
+				send(c, &r);
+		}
+		free(s);
+	}
+	threadexits(0);
+}
+
+
+void
+label(void)
+{
+	Window *w, enterw;
+	Keyboardctl kbdctl;
+	char buf[1024];
+	int n;
+
+	w = pointto(TRUE);
+	riosetcursor(nil, 0);
+	if(w == nil)
+		return;
+	enterw.ck = chancreate(sizeof(char*), 0);
+	kbdctl.c = chancreate(sizeof(Rune), 20);
+	input = &enterw;
+	threadcreate(labelthread, kbdctl.c, STACK);
+	strecpy(buf, buf+sizeof(buf), w->label);
+	n = enter("Label", buf, sizeof(buf), mousectl, &kbdctl, wscreen);
+	sendp(enterw.ck, nil);
+	input = w;
+	chanfree(enterw.ck);
+	chanfree(kbdctl.c);
+	if(n<=0)
+		return;
+	free(w->label);
+	w->label = estrdup(buf);
+}
+
 Window*
 new(Image *i, int hideit, int scrollit, int pid, char *dir, char *cmd, char **argv)
 {