diff --git a/pyqtgraph/widgets/SpinBox.py b/pyqtgraph/widgets/SpinBox.py
index a71bf660..b8066cd7 100644
--- a/pyqtgraph/widgets/SpinBox.py
+++ b/pyqtgraph/widgets/SpinBox.py
@@ -18,12 +18,14 @@ class SpinBox(QtGui.QAbstractSpinBox):
     """
     **Bases:** QtGui.QAbstractSpinBox
     
-    QSpinBox widget on steroids. Allows selection of numerical value, with extra features:
+    Extension of QSpinBox widget for selection of a numerical value.     
+    Adds many extra features:
     
-    - SI prefix notation (eg, automatically display "300 mV" instead of "0.003 V")
-    - Float values with linear and decimal stepping (1-9, 10-90, 100-900, etc.)
-    - Option for unbounded values
-    - Delayed signals (allows multiple rapid changes with only one change signal)
+    * SI prefix notation (eg, automatically display "300 mV" instead of "0.003 V")
+    * Float values with linear and decimal stepping (1-9, 10-90, 100-900, etc.)
+    * Option for unbounded values
+    * Delayed signals (allows multiple rapid changes with only one change signal)
+    * Customizable text formatting
     
     =============================  ==============================================
     **Signals:**
diff --git a/pyqtgraph/widgets/tests/test_spinbox.py b/pyqtgraph/widgets/tests/test_spinbox.py
index b3934d78..10087881 100644
--- a/pyqtgraph/widgets/tests/test_spinbox.py
+++ b/pyqtgraph/widgets/tests/test_spinbox.py
@@ -2,7 +2,7 @@ import pyqtgraph as pg
 pg.mkQApp()
 
 
-def test_spinbox():
+def test_spinbox_formatting():
     sb = pg.SpinBox()
     assert sb.opts['decimals'] == 6
     assert sb.opts['int'] is False
@@ -18,6 +18,7 @@ def test_spinbox():
         (12345678955, '12345678955', dict(int=True, decimals=100)),
         (1.45e-9, '1.45e-09 A', dict(int=False, decimals=6, suffix='A', siPrefix=False)),
         (1.45e-9, '1.45 nA', dict(int=False, decimals=6, suffix='A', siPrefix=True)),
+        (-2500.3427, '$-2500.34', dict(int=False, format='${value:0.02f}')),
     ]
     
     for (value, text, opts) in conds: