diff --git a/hex.c b/hex.c
index 13e25fd..9356aee 100644
--- a/hex.c
+++ b/hex.c
@@ -41,7 +41,7 @@ static int to_disp(int c)
 
 static int hex_backward_offset(EditState *s, int offset)
 {
-    return align(offset, s->disp_width);
+    return align(offset, s->dump_width);
 }
 
 static int hex_display(EditState *s, DisplayState *ds, int offset)
@@ -57,14 +57,14 @@ static int hex_display(EditState *s, DisplayState *ds, int offset)
 
     ateof = 0;
     len = s->b->total_size - offset;
-    if (len > s->disp_width)
-        len = s->disp_width;
+    if (len > s->dump_width)
+        len = s->dump_width;
 
     if (s->mode == &hex_mode) {
 
         ds->style = HEX_STYLE_DUMP;
 
-        for (j = 0; j < s->disp_width; j++) {
+        for (j = 0; j < s->dump_width; j++) {
             display_char(ds, -1, -1, ' ');
             offset1 = offset + j;
             offset2 = offset1 + 1;
@@ -91,7 +91,7 @@ static int hex_display(EditState *s, DisplayState *ds, int offset)
     display_char(ds, -1, -1, ' ');
 
     ateof = 0;
-    for (j = 0; j < s->disp_width; j++) {
+    for (j = 0; j < s->dump_width; j++) {
         offset1 = offset + j;
         offset2 = offset1 + 1;
         if (j < len) {
@@ -108,7 +108,7 @@ static int hex_display(EditState *s, DisplayState *ds, int offset)
     }
     display_eol(ds, -1, -1);
 
-    if (len >= s->disp_width)
+    if (len >= s->dump_width)
         return offset + len;
     else
         return -1;
@@ -117,7 +117,7 @@ static int hex_display(EditState *s, DisplayState *ds, int offset)
 static void do_set_width(EditState *s, int w)
 {
     if (w >= 1) {
-        s->disp_width = w;
+        s->dump_width = w;
         s->offset_top = s->mode->text_backward_offset(s, s->offset_top);
     }
 }
@@ -125,7 +125,7 @@ static void do_set_width(EditState *s, int w)
 static void do_incr_width(EditState *s, int incr)
 {
     int w;
-    w = s->disp_width + incr;
+    w = s->dump_width + incr;
     if (w >= 1)
         do_set_width(s, w);
 }
@@ -166,11 +166,15 @@ static int binary_mode_init(EditState *s, EditBuffer *b, int flags)
         num_width = glyph_width(s->screen, font, '0');
         release_font(s->screen, font);
 
-        s->disp_width = (s->screen->width / num_width) - 10;
+        s->dump_width = s->screen->width / num_width;
+        if (s->b->flags & BF_PREVIEW)
+            s->dump_width = s->dump_width * 4 / 5;
+
+        s->dump_width -= 10;
         /* align on 16 byte boundary */
-        s->disp_width &= ~15;
-        if (s->disp_width < 16)
-            s->disp_width = 16;
+        s->dump_width &= ~15;
+        if (s->dump_width < 16)
+            s->dump_width = 16;
         s->insert = 0;
         s->hex_mode = 0;
         s->wrap = WRAP_TRUNCATE;
@@ -181,7 +185,7 @@ static int binary_mode_init(EditState *s, EditBuffer *b, int flags)
 static int hex_mode_init(EditState *s, EditBuffer *b, int flags)
 {
     if (s) {
-        s->disp_width = 16;
+        s->dump_width = 16;
         s->hex_mode = 1;
         s->unihex_mode = 0;
         s->hex_nibble = 0;
@@ -216,12 +220,12 @@ static int hex_mode_probe(ModeDef *mode, ModeProbeData *p)
 
 static void hex_move_bol(EditState *s)
 {
-    s->offset = align(s->offset, s->disp_width);
+    s->offset = align(s->offset, s->dump_width);
 }
 
 static void hex_move_eol(EditState *s)
 {
-    s->offset = align(s->offset, s->disp_width) + s->disp_width - 1;
+    s->offset = align(s->offset, s->dump_width) + s->dump_width - 1;
     if (s->offset > s->b->total_size)
         s->offset = s->b->total_size;
 }
@@ -238,7 +242,7 @@ static void hex_move_left_right(EditState *s, int dir)
 
 static void hex_move_up_down(EditState *s, int dir)
 {
-    s->offset += dir * s->disp_width;
+    s->offset += dir * s->dump_width;
     if (s->offset < 0)
         s->offset = 0;
     else
@@ -318,9 +322,14 @@ static void hex_mode_line(EditState *s, buf_t *out)
     buf_printf(out, "--%d%%", compute_percent(s->offset, s->b->total_size));
 }
 
+static int binary_mode_probe(ModeDef *mode, ModeProbeData *p)
+{
+    return 5;
+}
+
 static ModeDef binary_mode = {
     .name = "binary",
-    .mode_probe = NULL,
+    .mode_probe = binary_mode_probe,
     .mode_init = binary_mode_init,
     .text_display = hex_display,
     .text_backward_offset = hex_backward_offset,
diff --git a/qe.h b/qe.h
index a3a174a..793f27c 100644
--- a/qe.h
+++ b/qe.h
@@ -1129,7 +1129,7 @@ struct EditState {
     int y_disp;    /* virtual position of the displayed text */
     int x_disp[2]; /* position for LTR and RTL text resp. */
     int minibuf;   /* true if single line editing */
-    int disp_width;  /* width in binary, hex and unihex modes */
+    int dump_width;  /* width in binary, hex and unihex modes */
     int hex_mode;    /* true if we are currently editing hexa */
     int unihex_mode; /* true if unihex editing (width of hex char dump) */
     int hex_nibble;  /* current hexa nibble */
diff --git a/unihex.c b/unihex.c
index 44fdafa..379532b 100644
--- a/unihex.c
+++ b/unihex.c
@@ -44,7 +44,7 @@ static int unihex_mode_init(EditState *s, EditBuffer *b, int flags)
 
         s->unihex_mode = snprintf(NULL, 0, "%x", maxc);
 
-        s->disp_width = 32 / s->unihex_mode;
+        s->dump_width = 32 / s->unihex_mode;
         s->hex_mode = 1;
         s->hex_nibble = 0;
         s->insert = 0;
@@ -69,13 +69,13 @@ static int unihex_backward_offset(EditState *s, int offset)
 
     /* CG: beware: offset may fall inside a character */
     pos = eb_get_char_offset(s->b, offset);
-    pos = align(pos, s->disp_width);
+    pos = align(pos, s->dump_width);
     return eb_goto_char(s->b, pos);
 }
 
 static int unihex_display(EditState *s, DisplayState *ds, int offset)
 {
-    int j, len, ateof, disp_width;
+    int j, len, ateof, dump_width;
     int offset1, offset2;
     unsigned int b;
     /* CG: array size is incorrect, should be smaller */
@@ -90,10 +90,10 @@ static int unihex_display(EditState *s, DisplayState *ds, int offset)
     //display_printf(ds, -1, -1, "%08x ", charpos);
     //display_printf(ds, -1, -1, "%08x %08x ", charpos, offset);
 
-    disp_width = min(LINE_MAX_SIZE - 1, s->disp_width);
+    dump_width = min(LINE_MAX_SIZE - 1, s->dump_width);
     ateof = 0;
     len = 0;
-    for (j = 0; j < disp_width && offset < s->b->total_size; j++) {
+    for (j = 0; j < dump_width && offset < s->b->total_size; j++) {
         pos[len] = offset;
         buf[len] = eb_nextc(s->b, offset, &offset);
         len++;
@@ -102,7 +102,7 @@ static int unihex_display(EditState *s, DisplayState *ds, int offset)
 
     ds->style = UNIHEX_STYLE_DUMP;
 
-    for (j = 0; j < disp_width; j++) {
+    for (j = 0; j < dump_width; j++) {
         display_char(ds, -1, -1, ' ');
         offset1 = pos[j];
         offset2 = pos[j + 1];
@@ -132,7 +132,7 @@ static int unihex_display(EditState *s, DisplayState *ds, int offset)
     display_char(ds, -1, -1, ' ');
 
     ateof = 0;
-    for (j = 0; j < disp_width; j++) {
+    for (j = 0; j < dump_width; j++) {
         offset1 = pos[j];
         offset2 = pos[j + 1];
         if (j < len) {
@@ -156,7 +156,7 @@ static int unihex_display(EditState *s, DisplayState *ds, int offset)
     }
     display_eol(ds, -1, -1);
 
-    if (len >= disp_width)
+    if (len >= dump_width)
         return offset;
     else
         return -1;
@@ -167,7 +167,7 @@ static void unihex_move_bol(EditState *s)
     int pos;
 
     pos = eb_get_char_offset(s->b, s->offset);
-    pos = align(pos, s->disp_width);
+    pos = align(pos, s->dump_width);
     s->offset = eb_goto_char(s->b, pos);
 }
 
@@ -178,7 +178,7 @@ static void unihex_move_eol(EditState *s)
     pos = eb_get_char_offset(s->b, s->offset);
 
     /* CG: should include the last character! */
-    pos = align(pos, s->disp_width) + s->disp_width - 1;
+    pos = align(pos, s->dump_width) + s->dump_width - 1;
 
     s->offset = eb_goto_char(s->b, pos);
 }
@@ -198,7 +198,7 @@ static void unihex_move_up_down(EditState *s, int dir)
 
     pos = eb_get_char_offset(s->b, s->offset);
 
-    pos += dir * s->disp_width;
+    pos += dir * s->dump_width;
 
     s->offset = eb_goto_char(s->b, pos);
 }
diff --git a/variables.c b/variables.c
index cc5bdb0..a9262fd 100644
--- a/variables.c
+++ b/variables.c
@@ -70,12 +70,13 @@ static VarDef var_table[] = {
     W_VAR( "window-left", xleft, VAR_NUMBER, VAR_RW )
     W_VAR( "window-top", ytop, VAR_NUMBER, VAR_RW )
     W_VAR( "window-prompt", prompt, VAR_STRING, VAR_RW )
+    W_VAR( "dump-width", dump_width, VAR_NUMBER, VAR_RW )
 
     M_VAR( "mode-name", name, VAR_STRING, VAR_RO )
     M_VAR( "auto-indent", auto_indent, VAR_NUMBER, VAR_RW )
 
     /* more buffer fields: modified, readonly, binary, charset */
-    /* more window fields: mode_line, disp_width, color, input_method...
+    /* more window fields: mode_line, color, input_method...
      */
 
     //G_VAR( "text-mode-line", text_mode.mode_line, VAR_STRING, VAR_RW )