diff --git a/src/plotcontrolpanel.cpp b/src/plotcontrolpanel.cpp
--- a/src/plotcontrolpanel.cpp
+++ b/src/plotcontrolpanel.cpp
@@ -136,25 +136,8 @@ PlotControlPanel::PlotControlPanel(QWidg
     connect(ui->spPlotWidth, SIGNAL(valueChanged(int)),
             this, SLOT(onPlotWidthChanged()));
 
-    // init scale range preset list
-    for (int nbits = 8; nbits <= 24; nbits++) // signed binary formats
-    {
-        int rmax = pow(2, nbits-1)-1;
-        int rmin = -rmax-1;
-        Range r = {double(rmin),  double(rmax)};
-        ui->cbRangePresets->addItem(
-            QString().sprintf("Signed %d bits %d to +%d", nbits, rmin, rmax),
-            QVariant::fromValue(r));
-    }
-    for (int nbits = 8; nbits <= 24; nbits++) // unsigned binary formats
-    {
-        int rmax = pow(2, nbits)-1;
-        ui->cbRangePresets->addItem(
-            QString().sprintf("Unsigned %d bits %d to +%d", nbits, 0, rmax),
-            QVariant::fromValue(Range{0, double(rmax)}));
-    }
-    ui->cbRangePresets->addItem("-1 to +1", QVariant::fromValue(Range{-1, +1}));
-    ui->cbRangePresets->addItem("0 to +1", QVariant::fromValue(Range{0, +1}));
+
+
     ui->cbRangePresets->addItem("-100 to +100", QVariant::fromValue(Range{-100, +100}));
     ui->cbRangePresets->addItem("0 to +100", QVariant::fromValue(Range{0, +100}));