diff --git a/OSBindings/Mac/Clock Signal/Base.lproj/Activity.xib b/OSBindings/Mac/Clock Signal/Base.lproj/Activity.xib
index 66031a7ae..9da4bb282 100644
--- a/OSBindings/Mac/Clock Signal/Base.lproj/Activity.xib	
+++ b/OSBindings/Mac/Clock Signal/Base.lproj/Activity.xib	
@@ -89,10 +89,7 @@
                     <constraint firstItem="bvH-EJ-TYb" firstAttribute="top" secondItem="0rV-Th-Zwt" secondAttribute="bottom" constant="9" id="0xw-qA-6vP"/>
                     <constraint firstAttribute="trailing" relation="greaterThanOrEqual" secondItem="14O-Lq-Npx" secondAttribute="trailing" constant="20" id="5eo-XI-a3W"/>
                     <constraint firstItem="Tah-UQ-vdf" firstAttribute="centerY" secondItem="ySY-ir-hzb" secondAttribute="centerY" id="6Hn-ts-mTi"/>
-                    <constraint firstAttribute="bottom" relation="greaterThanOrEqual" secondItem="0rV-Th-Zwt" secondAttribute="bottom" constant="20" id="CNH-SV-KNi"/>
-                    <constraint firstAttribute="bottom" relation="greaterThanOrEqual" secondItem="bvH-EJ-TYb" secondAttribute="bottom" constant="20" id="DYI-qH-t52"/>
                     <constraint firstItem="R0g-Oa-VB5" firstAttribute="leading" secondItem="bvH-EJ-TYb" secondAttribute="trailing" constant="10" id="Dgy-JI-nA1"/>
-                    <constraint firstAttribute="bottom" relation="greaterThanOrEqual" secondItem="ncQ-wN-C61" secondAttribute="bottom" constant="20" id="ENa-Xb-FBv"/>
                     <constraint firstItem="R0g-Oa-VB5" firstAttribute="centerY" secondItem="bvH-EJ-TYb" secondAttribute="centerY" id="Gfq-mB-Y1z"/>
                     <constraint firstItem="Acy-tT-OFH" firstAttribute="centerY" secondItem="0rV-Th-Zwt" secondAttribute="centerY" id="ImF-rK-oOr"/>
                     <constraint firstItem="Acy-tT-OFH" firstAttribute="leading" secondItem="0rV-Th-Zwt" secondAttribute="trailing" constant="10" id="JSU-pZ-l9Q"/>
@@ -108,7 +105,6 @@
                     <constraint firstItem="ncQ-wN-C61" firstAttribute="top" secondItem="ySY-ir-hzb" secondAttribute="bottom" constant="9" id="mSc-jj-amw"/>
                     <constraint firstAttribute="trailing" relation="greaterThanOrEqual" secondItem="R0g-Oa-VB5" secondAttribute="trailing" constant="20" id="sR8-Ph-suC"/>
                     <constraint firstItem="ySY-ir-hzb" firstAttribute="top" secondItem="tpZ-0B-QQu" secondAttribute="top" constant="20" id="wbj-48-DYq"/>
-                    <constraint firstAttribute="bottom" relation="greaterThanOrEqual" secondItem="ySY-ir-hzb" secondAttribute="bottom" constant="20" id="yxz-Hb-Pol"/>
                 </constraints>
             </view>
             <point key="canvasLocation" x="84" y="115"/>
diff --git a/OSBindings/Mac/Clock Signal/Documents/MachineDocument.swift b/OSBindings/Mac/Clock Signal/Documents/MachineDocument.swift
index 90b92dd71..4443c9380 100644
--- a/OSBindings/Mac/Clock Signal/Documents/MachineDocument.swift	
+++ b/OSBindings/Mac/Clock Signal/Documents/MachineDocument.swift	
@@ -319,18 +319,6 @@ class MachineDocument:
 			Bundle.main.loadNibNamed(NSNib.Name(rawValue: "Activity"), owner: self, topLevelObjects: nil)
 			showActivity(nil)
 
-			// Add a constraints to minimise window height.
-//			let heightConstraint = NSLayoutConstraint(
-//				item: self.activityPanel.contentView!,
-//				attribute: .height,
-//				relatedBy: .equal,
-//				toItem: nil,
-//				attribute: .notAnAttribute,
-//				multiplier: 0.0,
-//				constant: 20.0)
-//			heightConstraint.priority = .defaultLow
-//			self.activityPanel.contentView?.addConstraint(heightConstraint)
-
 			// Inspect the activity panel for indicators.
 			var activityIndicators: [NSLevelIndicator] = []
 			var textFields: [NSTextField] = []
@@ -362,6 +350,17 @@ class MachineDocument:
 				textFields[c].stringValue = leds[c]
 				self.leds[leds[c]] = LED(levelIndicator: activityIndicators[c])
 			}
+
+			// Add a constraints to minimise window height.
+			let heightConstraint = NSLayoutConstraint(
+				item: self.activityPanel.contentView!,
+				attribute: .bottom,
+				relatedBy: .equal,
+				toItem: activityIndicators[leds.count-1],
+				attribute: .bottom,
+				multiplier: 1.0,
+				constant: 20.0)
+			self.activityPanel.contentView?.addConstraint(heightConstraint)
 		}
 	}