diff --git a/NetNewsWire.xcodeproj/project.pbxproj b/NetNewsWire.xcodeproj/project.pbxproj
index b116fdf19..94820373d 100644
--- a/NetNewsWire.xcodeproj/project.pbxproj
+++ b/NetNewsWire.xcodeproj/project.pbxproj
@@ -14,6 +14,7 @@
 		5108F6D22375EED2001ABC45 /* TimelineCustomizerViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5108F6D12375EED2001ABC45 /* TimelineCustomizerViewController.swift */; };
 		5108F6D42375EEEF001ABC45 /* TimelinePreviewTableViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5108F6D32375EEEF001ABC45 /* TimelinePreviewTableViewController.swift */; };
 		5108F6D623762309001ABC45 /* MasterTimelineIconSize.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5108F6D523762309001ABC45 /* MasterTimelineIconSize.swift */; };
+		5108F6D823763094001ABC45 /* TickMarkSlider.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5108F6D723763094001ABC45 /* TickMarkSlider.swift */; };
 		51102165233A7D6C0007A5F7 /* ArticleExtractorButton.swift in Sources */ = {isa = PBXBuildFile; fileRef = 51102164233A7D6C0007A5F7 /* ArticleExtractorButton.swift */; };
 		5110C37D2373A8D100A9C04F /* InspectorIconHeaderView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5110C37C2373A8D100A9C04F /* InspectorIconHeaderView.swift */; };
 		51126DA4225FDE2F00722696 /* RSImage-Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = 51126DA3225FDE2F00722696 /* RSImage-Extensions.swift */; };
@@ -1210,6 +1211,7 @@
 		5108F6D12375EED2001ABC45 /* TimelineCustomizerViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TimelineCustomizerViewController.swift; sourceTree = "<group>"; };
 		5108F6D32375EEEF001ABC45 /* TimelinePreviewTableViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TimelinePreviewTableViewController.swift; sourceTree = "<group>"; };
 		5108F6D523762309001ABC45 /* MasterTimelineIconSize.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MasterTimelineIconSize.swift; sourceTree = "<group>"; };
+		5108F6D723763094001ABC45 /* TickMarkSlider.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TickMarkSlider.swift; sourceTree = "<group>"; };
 		51102164233A7D6C0007A5F7 /* ArticleExtractorButton.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ArticleExtractorButton.swift; sourceTree = "<group>"; };
 		5110C37C2373A8D100A9C04F /* InspectorIconHeaderView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = InspectorIconHeaderView.swift; sourceTree = "<group>"; };
 		51121AA12265430A00BC0EC1 /* NetNewsWire_iOSapp_target.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; path = NetNewsWire_iOSapp_target.xcconfig; sourceTree = "<group>"; };
@@ -1864,6 +1866,7 @@
 				51FFF0C3235EE8E5002762AA /* VibrantButton.swift */,
 				5186A634235EF3A800C97195 /* VibrantLabel.swift */,
 				5F323808231DF9F000706F6B /* VibrantTableViewCell.swift */,
+				5108F6D723763094001ABC45 /* TickMarkSlider.swift */,
 			);
 			path = "UIKit Extensions";
 			sourceTree = "<group>";
@@ -3984,6 +3987,7 @@
 				51EF0F7E2277A57D0050506E /* MasterTimelineAccessibilityCellLayout.swift in Sources */,
 				51A1699B235E10D700EB091F /* AccountInspectorViewController.swift in Sources */,
 				51C452762265091600C03939 /* MasterTimelineViewController.swift in Sources */,
+				5108F6D823763094001ABC45 /* TickMarkSlider.swift in Sources */,
 				5183CCE9226F68D90010922C /* AccountRefreshTimer.swift in Sources */,
 				51C452882265093600C03939 /* AddFeedViewController.swift in Sources */,
 				51A169A0235E10D700EB091F /* FeedbinAccountViewController.swift in Sources */,
diff --git a/iOS/AppAssets.swift b/iOS/AppAssets.swift
index 2c365c1ba..36e6c057a 100644
--- a/iOS/AppAssets.swift
+++ b/iOS/AppAssets.swift
@@ -161,6 +161,10 @@ struct AppAssets {
 		return IconImage(UIImage(systemName: "star.fill")!)
 	}()
 
+	static var tickMarkColor: UIColor = {
+		return UIColor(named: "tickMarkColor")!
+	}()
+	
 	static var timelineStarImage: UIImage = {
 		let image = UIImage(systemName: "star.fill")!
 		return image.withTintColor(AppAssets.starColor, renderingMode: .alwaysOriginal)
diff --git a/iOS/Resources/Assets.xcassets/tickMarkColor.colorset/Contents.json b/iOS/Resources/Assets.xcassets/tickMarkColor.colorset/Contents.json
new file mode 100644
index 000000000..8ea7f403a
--- /dev/null
+++ b/iOS/Resources/Assets.xcassets/tickMarkColor.colorset/Contents.json
@@ -0,0 +1,38 @@
+{
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  },
+  "colors" : [
+    {
+      "idiom" : "universal",
+      "color" : {
+        "color-space" : "srgb",
+        "components" : {
+          "red" : "228",
+          "alpha" : "1.000",
+          "blue" : "230",
+          "green" : "228"
+        }
+      }
+    },
+    {
+      "idiom" : "universal",
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "dark"
+        }
+      ],
+      "color" : {
+        "color-space" : "srgb",
+        "components" : {
+          "red" : "59",
+          "alpha" : "1.000",
+          "blue" : "63",
+          "green" : "59"
+        }
+      }
+    }
+  ]
+}
\ No newline at end of file
diff --git a/iOS/Settings/Settings.storyboard b/iOS/Settings/Settings.storyboard
index 8100eb294..ff43a99bd 100644
--- a/iOS/Settings/Settings.storyboard
+++ b/iOS/Settings/Settings.storyboard
@@ -660,8 +660,10 @@
                             <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="Q4t-3M-goU">
                                 <rect key="frame" x="20" y="56" width="374" height="44"/>
                                 <subviews>
-                                    <slider opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" value="1" minValue="1" maxValue="3" translatesAutoresizingMaskIntoConstraints="NO" id="AW6-CH-AXP">
+                                    <slider opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" value="1" minValue="1" maxValue="3" translatesAutoresizingMaskIntoConstraints="NO" id="AW6-CH-AXP" customClass="TickMarkSlider" customModule="NetNewsWire" customModuleProvider="target">
                                         <rect key="frame" x="18" y="7" width="338" height="31"/>
+                                        <color key="tintColor" name="secondaryAccentColor"/>
+                                        <color key="thumbTintColor" name="primaryAccentColor"/>
                                         <connections>
                                             <action selector="iconSizeChanged:" destination="amD-xZ-U3A" eventType="valueChanged" id="4F9-gj-CJE"/>
                                         </connections>
@@ -690,8 +692,10 @@
                             <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="oQi-VX-CMV">
                                 <rect key="frame" x="20" y="156" width="374" height="44"/>
                                 <subviews>
-                                    <slider opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" value="1" minValue="1" maxValue="6" translatesAutoresizingMaskIntoConstraints="NO" id="AIu-s5-Hvq">
+                                    <slider opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" value="1" minValue="1" maxValue="6" translatesAutoresizingMaskIntoConstraints="NO" id="AIu-s5-Hvq" customClass="TickMarkSlider" customModule="NetNewsWire" customModuleProvider="target">
                                         <rect key="frame" x="18" y="7" width="338" height="31"/>
+                                        <color key="tintColor" name="secondaryAccentColor"/>
+                                        <color key="thumbTintColor" name="primaryAccentColor"/>
                                         <connections>
                                             <action selector="numberOfLinesChanged:" destination="amD-xZ-U3A" eventType="valueChanged" id="h25-Da-ZsS"/>
                                         </connections>
@@ -794,6 +798,7 @@
                             <constraint firstAttribute="bottom" secondItem="7do-cs-DNM" secondAttribute="bottom" id="eh9-tn-F3u"/>
                             <constraint firstItem="7do-cs-DNM" firstAttribute="leading" secondItem="xMG-o1-VfV" secondAttribute="leading" id="kW5-pQ-FCx"/>
                         </constraints>
+                        <viewLayoutGuide key="safeArea" id="XPF-1A-UKw"/>
                     </view>
                     <connections>
                         <outlet property="tableView" destination="7do-cs-DNM" id="A8q-7w-LCQ"/>
@@ -810,5 +815,8 @@
         <namedColor name="primaryAccentColor">
             <color red="0.031372549019607843" green="0.41568627450980394" blue="0.93333333333333335" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
         </namedColor>
+        <namedColor name="secondaryAccentColor">
+            <color red="0.031372549019607843" green="0.41568627450980394" blue="0.93333333333333335" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+        </namedColor>
     </resources>
 </document>
diff --git a/iOS/Settings/TimelineCustomizerViewController.swift b/iOS/Settings/TimelineCustomizerViewController.swift
index 2a0388777..07e642e4b 100644
--- a/iOS/Settings/TimelineCustomizerViewController.swift
+++ b/iOS/Settings/TimelineCustomizerViewController.swift
@@ -11,9 +11,9 @@ import UIKit
 class TimelineCustomizerViewController: UIViewController {
 
 	@IBOutlet weak var iconSizeSliderContainerView: UIView!
-	@IBOutlet weak var iconSizeSlider: UISlider!
+	@IBOutlet weak var iconSizeSlider: TickMarkSlider!
 	@IBOutlet weak var numberOfLinesSliderContainerView: UIView!
-	@IBOutlet weak var numberOfLinesSlider: UISlider!
+	@IBOutlet weak var numberOfLinesSlider: TickMarkSlider!
 	
 	@IBOutlet weak var previewWidthConstraint: NSLayoutConstraint!
 	@IBOutlet weak var previewHeightConstraint: NSLayoutConstraint!
@@ -27,10 +27,12 @@ class TimelineCustomizerViewController: UIViewController {
         super.viewDidLoad()
 
 		iconSizeSliderContainerView.layer.cornerRadius = 12
-		numberOfLinesSliderContainerView.layer.cornerRadius = 12
-		
-		numberOfLinesSlider.value = Float(AppDefaults.timelineNumberOfLines)
 		iconSizeSlider.value = Float(AppDefaults.timelineIconSize.rawValue)
+		iconSizeSlider.addTickMarks()
+
+		numberOfLinesSliderContainerView.layer.cornerRadius = 12
+		numberOfLinesSlider.value = Float(AppDefaults.timelineNumberOfLines)
+		numberOfLinesSlider.addTickMarks()
     }
 	
 	override func viewWillAppear(_ animated: Bool) {
@@ -45,13 +47,13 @@ class TimelineCustomizerViewController: UIViewController {
 	}
 
 	@IBAction func iconSizeChanged(_ sender: Any) {
-		guard let iconSize = MasterTimelineIconSize(rawValue: Int(iconSizeSlider.value)) else { return }
+		guard let iconSize = MasterTimelineIconSize(rawValue: Int(iconSizeSlider.value.rounded())) else { return }
 		AppDefaults.timelineIconSize = iconSize
 		updatePreview()
 	}
 	
 	@IBAction func numberOfLinesChanged(_ sender: Any) {
-		AppDefaults.timelineNumberOfLines = Int(numberOfLinesSlider.value)
+		AppDefaults.timelineNumberOfLines = Int(numberOfLinesSlider.value.rounded())
 		updatePreview()
 	}
 	
diff --git a/iOS/UIKit Extensions/TickMarkSlider.swift b/iOS/UIKit Extensions/TickMarkSlider.swift
new file mode 100644
index 000000000..69fa34f64
--- /dev/null
+++ b/iOS/UIKit Extensions/TickMarkSlider.swift	
@@ -0,0 +1,61 @@
+//
+//  TickMarkSlider.swift
+//  NetNewsWire-iOS
+//
+//  Created by Maurice Parker on 11/8/19.
+//  Copyright © 2019 Ranchero Software. All rights reserved.
+//
+
+import UIKit
+
+class TickMarkSlider: UISlider {
+
+	func addTickMarks() {
+
+		let numberOfGaps = Int(maximumValue) - Int(minimumValue)
+		
+		var gapLayoutGuides = [UILayoutGuide]()
+		
+		for i in 0...numberOfGaps {
+			
+			let tick = UIView()
+			tick.translatesAutoresizingMaskIntoConstraints = false
+			tick.backgroundColor = AppAssets.tickMarkColor
+			insertSubview(tick, belowSubview: self)
+
+			tick.widthAnchor.constraint(equalToConstant: 3).isActive = true
+			tick.heightAnchor.constraint(equalToConstant: 10).isActive = true
+			tick.centerYAnchor.constraint(equalTo: self.centerYAnchor).isActive = true
+
+			if i == 0 {
+				tick.leadingAnchor.constraint(equalTo: leadingAnchor).isActive = true
+			}
+			
+			if let lastGapLayoutGuild = gapLayoutGuides.last {
+				lastGapLayoutGuild.trailingAnchor.constraint(equalTo: tick.leadingAnchor).isActive = true
+			}
+			
+			if i != numberOfGaps {
+				let gapLayoutGuild = UILayoutGuide()
+				gapLayoutGuides.append(gapLayoutGuild)
+				addLayoutGuide(gapLayoutGuild)
+				tick.trailingAnchor.constraint(equalTo: gapLayoutGuild.leadingAnchor).isActive = true
+			} else {
+				tick.trailingAnchor.constraint(equalTo: trailingAnchor).isActive = true
+			}
+			
+		}
+		
+		if let firstGapLayoutGuild = gapLayoutGuides.first {
+			for i in 1..<gapLayoutGuides.count {
+				gapLayoutGuides[i].widthAnchor.constraint(equalTo: firstGapLayoutGuild.widthAnchor).isActive = true
+			}
+		}
+				
+	}
+
+	override func endTracking(_ touch: UITouch?, with event: UIEvent?) {
+		value = value.rounded()
+	}
+	
+}