diff --git a/artiq/dashboard/experiments.py b/artiq/dashboard/experiments.py
index 5a35063f1..460cbd357 100644
--- a/artiq/dashboard/experiments.py
+++ b/artiq/dashboard/experiments.py
@@ -8,7 +8,7 @@ from PyQt5 import QtCore, QtGui, QtWidgets
 import h5py
 
 from artiq.gui.tools import LayoutWidget, log_level_to_name, get_open_file_name
-from artiq.gui.entries import argty_to_entry
+from artiq.gui.entries import argty_to_entry, ScanEntry
 from artiq.protocols import pyon
 
 
@@ -78,9 +78,24 @@ class _ArgumentEditor(QtWidgets.QTreeWidget):
                     QtWidgets.QStyle.SP_BrowserReload))
             recompute_argument.clicked.connect(
                 partial(self._recompute_argument_clicked, name))
-            fix_layout = LayoutWidget()
-            fix_layout.addWidget(recompute_argument)
-            self.setItemWidget(widget_item, 2, fix_layout)
+
+            tool_buttons = LayoutWidget()
+            tool_buttons.addWidget(recompute_argument, 1)
+
+            if isinstance(entry, ScanEntry):
+                disable_other_scans = QtWidgets.QToolButton()
+                disable_other_scans.setIcon(
+                    QtWidgets.QApplication.style().standardIcon(
+                        QtWidgets.QStyle.SP_DialogResetButton))
+                disable_other_scans.setToolTip("Disable all other scans in "
+                                               "this experiment")
+                disable_other_scans.clicked.connect(
+                    partial(self._disable_other_scans, name))
+                tool_buttons.layout.setRowStretch(0, 1)
+                tool_buttons.layout.setRowStretch(3, 1)
+                tool_buttons.addWidget(disable_other_scans, 2)
+
+            self.setItemWidget(widget_item, 2, tool_buttons)
 
         widget_item = QtWidgets.QTreeWidgetItem()
         self.addTopLevelItem(widget_item)
@@ -142,6 +157,11 @@ class _ArgumentEditor(QtWidgets.QTreeWidget):
         self._arg_to_entry_widgetitem[name] = entry, widget_item
         self.setItemWidget(widget_item, 1, entry)
 
+    def _disable_other_scans(self, current_name):
+        for name, (entry, _) in self._arg_to_entry_widgetitem.items():
+            if name != current_name and isinstance(entry, ScanEntry):
+                entry.disable()
+
     def save_state(self):
         expanded = []
         for k, v in self._groups.items():
diff --git a/artiq/dashboard/shortcuts.py b/artiq/dashboard/shortcuts.py
index 23ee871ca..c7750d2a7 100644
--- a/artiq/dashboard/shortcuts.py
+++ b/artiq/dashboard/shortcuts.py
@@ -44,7 +44,7 @@ class ShortcutsDock(QtWidgets.QDockWidget):
 
             clear = QtWidgets.QToolButton()
             clear.setIcon(QtWidgets.QApplication.style().standardIcon(
-                QtWidgets.QStyle.SP_DialogResetButton))
+                QtWidgets.QStyle.SP_DialogDiscardButton))
             layout.addWidget(clear, row, 2)
             clear.clicked.connect(partial(self.set_shortcut, i, ""))
 
diff --git a/artiq/gui/entries.py b/artiq/gui/entries.py
index 020000d33..9571e34af 100644
--- a/artiq/gui/entries.py
+++ b/artiq/gui/entries.py
@@ -11,7 +11,7 @@ from artiq.gui.scientific_spinbox import ScientificSpinBox
 logger = logging.getLogger(__name__)
 
 
-class _StringEntry(QtWidgets.QLineEdit):
+class StringEntry(QtWidgets.QLineEdit):
     def __init__(self, argument):
         QtWidgets.QLineEdit.__init__(self)
         self.setText(argument["state"])
@@ -28,7 +28,7 @@ class _StringEntry(QtWidgets.QLineEdit):
         return procdesc.get("default", "")
 
 
-class _BooleanEntry(QtWidgets.QCheckBox):
+class BooleanEntry(QtWidgets.QCheckBox):
     def __init__(self, argument):
         QtWidgets.QCheckBox.__init__(self)
         self.setChecked(argument["state"])
@@ -45,7 +45,7 @@ class _BooleanEntry(QtWidgets.QCheckBox):
         return procdesc.get("default", False)
 
 
-class _EnumerationEntry(QtWidgets.QComboBox):
+class EnumerationEntry(QtWidgets.QComboBox):
     def __init__(self, argument):
         QtWidgets.QComboBox.__init__(self)
         disable_scroll_wheel(self)
@@ -69,7 +69,7 @@ class _EnumerationEntry(QtWidgets.QComboBox):
             return procdesc["choices"][0]
 
 
-class _NumberEntry(QtWidgets.QDoubleSpinBox):
+class NumberEntry(QtWidgets.QDoubleSpinBox):
     def __init__(self, argument):
         QtWidgets.QDoubleSpinBox.__init__(self)
         disable_scroll_wheel(self)
@@ -224,7 +224,7 @@ class _ExplicitScan(LayoutWidget):
         self.value.textEdited.connect(update)
 
 
-class _ScanEntry(LayoutWidget):
+class ScanEntry(LayoutWidget):
     def __init__(self, argument):
         LayoutWidget.__init__(self)
         self.argument = argument
@@ -256,6 +256,9 @@ class _ScanEntry(LayoutWidget):
         selected = argument["state"]["selected"]
         self.radiobuttons[selected].setChecked(True)
 
+    def disable(self):
+        self.radiobuttons["NoScan"].setChecked(True)
+
     @staticmethod
     def state_to_value(state):
         selected = state["selected"]
@@ -301,10 +304,10 @@ class _ScanEntry(LayoutWidget):
 
 
 argty_to_entry = {
-    "PYONValue": _StringEntry,
-    "BooleanValue": _BooleanEntry,
-    "EnumerationValue": _EnumerationEntry,
-    "NumberValue": _NumberEntry,
-    "StringValue": _StringEntry,
-    "Scannable": _ScanEntry
+    "PYONValue": StringEntry,
+    "BooleanValue": BooleanEntry,
+    "EnumerationValue": EnumerationEntry,
+    "NumberValue": NumberEntry,
+    "StringValue": StringEntry,
+    "Scannable": ScanEntry
 }