diff --git a/hgext3rd/interactiveui.py b/hgext3rd/interactiveui.py
--- a/hgext3rd/interactiveui.py
+++ b/hgext3rd/interactiveui.py
@@ -12,6 +12,12 @@
 import termios
 import tty
 
+from mercurial.i18n import _
+
+from mercurial import (
+    error,
+)
+
 def clearline():
     w = sys.stdout
     # ANSI
@@ -107,8 +113,10 @@
 
 def view(viewobj):
     done = False
+    if viewobj.ui.pageractive:
+        raise error.Abort(_("interactiveui doesn't work with pager"))
     s = viewobj.render()
-    print(s)
+    sys.stdout.write(s)
     while not done:
         output = getchar(sys.stdin.fileno())
         if repr(output) == '\'q\'':
@@ -123,7 +131,7 @@
             viewobj.rightarrow()
         if repr(output) == '\'\\x1b[D\'':
             viewobj.leftarrow()
-        for i in range(len(s.split("\n"))):
+        for i in range(len(s.split("\n")) - 1):
             clearline()
         s = viewobj.render()
-        print(s)
+        sys.stdout.write(s)
diff --git a/hgext3rd/undo.py b/hgext3rd/undo.py
--- a/hgext3rd/undo.py
+++ b/hgext3rd/undo.py
@@ -653,6 +653,10 @@
                 ui = self.ui
                 ui.pushbuffer()
                 _preview(ui, self.repo, self.index)
+                repo.ui.status(_("left arrow for next, "
+                                 "right arrow for previous, "
+                                 "enter for goto, "
+                                 "q for quit\n"))
                 return ui.popbuffer()
             def rightarrow(self):
                 self.index += 1
@@ -862,8 +866,8 @@
     commandstr = _readnode(repo, "command.i", nodedict["command"])
     commandlist = commandstr.split("\0")[1:]
     commandstr = " ".join(commandlist)
-    uimessage = 'undone to %s, before %s\n' % (time, commandstr)
-    repo.ui.status(_(uimessage))
+    uimessage = _('undone to %s, before %s\n') % (time, commandstr)
+    repo.ui.status((uimessage))
 
 def _computerelative(repo, reverseindex, absolute=False, branch=""):
     # allows for relative undos using
@@ -1069,6 +1073,9 @@
     #   None
 
     # override "UNDOINDEX" as a variable usable in template
+    if not _gapcheck(ui, repo, reverseindex):
+        repo.ui.status(_("WARN: missing history between present and this"
+                         " state\n"))
     overrides = {
         ('templates', 'UNDOINDEX'): str(reverseindex),
     }
@@ -1082,6 +1089,17 @@
     try:
         with ui.configoverride(overrides):
             cmdutil.graphlog(ui, repo, None, opts)
+        # informative output
+        nodedict = _readindex(repo, reverseindex)
+        time = _readnode(repo, "date.i", nodedict["date"])
+        time = util.datestr([float(x) for x in time.split(" ")])
+
+        nodedict = _readindex(repo, reverseindex - 1)
+        commandstr = _readnode(repo, "command.i", nodedict["command"])
+        commandlist = commandstr.split("\0")[1:]
+        commandstr = " ".join(commandlist)
+        uimessage = _('undo to %s, before %s\n') % (time, commandstr)
+        repo.ui.status((uimessage))
     except IndexError:
         # don't print anything
         pass