diff --git a/const.h b/const.h
new file mode 100644
index 0000000..f33b409
--- /dev/null
+++ b/const.h
@@ -0,0 +1,27 @@
+
+/*******************************************************************************/
+/* Copyright (C) 2008 Jonathan Moore Liles                                     */
+/*                                                                             */
+/* This program is free software; you can redistribute it and/or modify it     */
+/* under the terms of the GNU General Public License as published by the       */
+/* Free Software Foundation; either version 2 of the License, or (at your      */
+/* option) any later version.                                                  */
+/*                                                                             */
+/* This program is distributed in the hope that it will be useful, but WITHOUT */
+/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or       */
+/* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for   */
+/* more details.                                                               */
+/*                                                                             */
+/* You should have received a copy of the GNU General Public License along     */
+/* with This program; see the file COPYING.  If not,write to the Free Software */
+/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+/*******************************************************************************/
+
+
+
+
+
+
+/* default peak file resolution, therefore normally any zoom level less than this will
+ require reading from the audio files directly */
+const int FRAMES_PER_PEAK = 256;
diff --git a/main.C b/main.C
index e6fcd7f..1a0a157 100644
--- a/main.C
+++ b/main.C
@@ -40,6 +40,8 @@ Fl_Color velocity_colors[128];
 #include "Track.H"
 #include "Timeline.H"
 
+#include "const.h"
+
 void
 init_colors ( void )
 {
@@ -64,6 +66,11 @@ cb_zoom ( Fl_Widget *w, void *v )
 
     timeline.scroll->redraw();
 
+    if ( timeline.fpp < FRAMES_PER_PEAK )
+        w->selection_color( FL_RED );
+    else
+        w->selection_color( FL_GRAY );
+
     printf( "%f\n", timeline.fpp );
 }
 
@@ -136,7 +143,7 @@ main ( int argc, char **argv )
     Fl_Slider *zoom_slider = new Fl_Slider( 0, 0, 800, 24 );
     zoom_slider->type( 1 );
     zoom_slider->callback( cb_zoom, 0 );
-    zoom_slider->range( 1, 1024 );
+    zoom_slider->range( 2, 4096 );
     zoom_slider->step( 1 );
     zoom_slider->value( 256 );