diff --git a/cuttlefish/package/contents/ui/Comparison.qml b/cuttlefish/package/contents/ui/Comparison.qml
new file mode 100644
--- /dev/null
+++ b/cuttlefish/package/contents/ui/Comparison.qml
@@ -0,0 +1,83 @@
+import QtQuick 2.0
+import QtQuick.Controls 2.5 as QQC2
+import QtQuick.Layouts 1.0
+
+import org.kde.kirigami 2.8 as Kirigami
+
+Kirigami.OverlaySheet {
+    property int comparisonSize
+
+    background: Rectangle {
+        id:background
+        color: cuttlefish.bgcolor
+        anchors.fill: parent
+    }
+
+    onSheetOpenChanged: {
+        if (sheetOpen) {
+            comparisonSize = iconSize;
+            comparisonSlider.value = [8, 16, 22, 32, 48, 64, 128].indexOf(comparisonSize);
+        }
+    }
+
+    ColumnLayout {
+        Kirigami.Theme.textColor: cuttlefish.textcolor
+        Kirigami.Theme.highlightColor: cuttlefish.highlightcolor
+        Kirigami.Theme.highlightedTextColor: cuttlefish.highlightedtextcolor
+        Kirigami.Theme.positiveTextColor: cuttlefish.positivetextcolor
+        Kirigami.Theme.neutralTextColor: cuttlefish.neutraltextcolor
+        Kirigami.Theme.negativeTextColor: cuttlefish.negativetextcolor
+        RowLayout {
+            Layout.alignment: Qt.AlignHCenter
+            QQC2.Slider {
+                Layout.preferredWidth: comparisonGrid.width * 0.75
+                id: comparisonSlider
+                to: 6.0
+                stepSize: 1.0
+                snapMode: QQC2.Slider.SnapAlways
+                onValueChanged: {
+                    comparisonTimer.restart()
+                }
+
+                Timer {
+                    id: comparisonTimer
+                    running: false
+                    repeat: false
+                    interval: 200
+                    onTriggered: comparisonSize = indexToSize(comparisonSlider.value)
+                }
+            }
+            QQC2.Label {
+                text: indexToSize(comparisonSlider.value)
+            }
+        }
+        GridView {
+            Layout.fillWidth: true
+            Layout.preferredHeight: contentHeight
+            id: comparisonGrid
+            cellWidth: 128 + 2 * Kirigami.Units.largeSpacing
+            cellHeight: 128 + 2 * Kirigami.Units.gridUnit  +  Kirigami.Units.largeSpacing
+            model: sheetOpen ? iconModel.inOtherThemes(preview.iconName, comparisonSize) : []
+            delegate: ColumnLayout {
+                id: iconColumn
+                width: comparisonGrid.cellWidth
+                height: comparisonGrid.cellHeight
+                spacing: 0
+                Kirigami.Icon {
+                    source: modelData.iconPath
+                    Layout.preferredWidth: comparisonSize
+                    Layout.preferredHeight: comparisonSize
+                    Layout.alignment: Qt.AlignCenter
+                    Layout.topMargin: comparisonSize == 128 ? 0 : themeName.height
+                    Layout.bottomMargin: Kirigami.Units.largeSpacing
+                }
+                QQC2.Label {
+                    id: themeName
+                    text: modelData.themeName
+                    horizontalAlignment: Text.AlignHCenter
+                    Layout.alignment: Qt.AlignHCenter | Qt.AlignBottom
+                }
+            }
+        }
+    }
+}
diff --git a/cuttlefish/package/contents/ui/Preview.qml b/cuttlefish/package/contents/ui/Preview.qml
--- a/cuttlefish/package/contents/ui/Preview.qml
+++ b/cuttlefish/package/contents/ui/Preview.qml
@@ -305,6 +305,12 @@
                 }
             }
         }
+        QQC2.Button {
+            Layout.alignment: Qt.AlignCenter
+            text: i18n("View icon in other themes")
+            icon.name: "document-equal"
+            onClicked: comparison.sheetOpen = true
+        }
         Item {
             Layout.fillHeight: true
         }
diff --git a/cuttlefish/package/contents/ui/ResponsivePreview.qml b/cuttlefish/package/contents/ui/ResponsivePreview.qml
--- a/cuttlefish/package/contents/ui/ResponsivePreview.qml
+++ b/cuttlefish/package/contents/ui/ResponsivePreview.qml
@@ -90,6 +90,11 @@
                 onTriggered: iconPreview.shot("active")
                 text: i18n("Active Color Scheme")
             }
+        },
+        Kirigami.Action {
+            text: i18n("View icon in other themes")
+            icon.name: "document-equal"
+            onTriggered: comparison.sheetOpen = true
         }
     ]
     Kirigami.Heading {
diff --git a/cuttlefish/package/contents/ui/cuttlefish.qml b/cuttlefish/package/contents/ui/cuttlefish.qml
--- a/cuttlefish/package/contents/ui/cuttlefish.qml
+++ b/cuttlefish/package/contents/ui/cuttlefish.qml
@@ -207,6 +207,9 @@
         active: !cuttlefish.widescreen
         source: "ResponsivePreview.qml"
     }
+    Comparison {
+        id: comparison
+    }
     Connections {
         target: tools
         onColorschemeChanged: (index) => {
diff --git a/cuttlefish/src/iconmodel.h b/cuttlefish/src/iconmodel.h
--- a/cuttlefish/src/iconmodel.h
+++ b/cuttlefish/src/iconmodel.h
@@ -27,6 +27,7 @@
 #include <QJsonObject>
 #include <QFileInfo>
 #include <QVariantMap>
+#include <QVariantList>
 
 namespace CuttleFish {
 
@@ -59,6 +60,7 @@
 
     explicit IconModel(QObject *parent = nullptr);
 
+    Q_INVOKABLE QVariantList inOtherThemes(const QString& iconName, int size);
 
     QHash<int, QByteArray> roleNames() const override;
     int rowCount(const QModelIndex &parent) const override;
diff --git a/cuttlefish/src/iconmodel.cpp b/cuttlefish/src/iconmodel.cpp
--- a/cuttlefish/src/iconmodel.cpp
+++ b/cuttlefish/src/iconmodel.cpp
@@ -409,3 +409,14 @@
     cout.flush();
 }
 
+QVariantList IconModel::inOtherThemes(const QString& name, int iconSize)
+{
+    QVariantList list;
+    const QStringList themes = KIconTheme::list();
+    for (const auto& themeName : themes) {
+        const KIconTheme theme(themeName);
+        const QString iconPath = theme.iconPathByName(name, iconSize, KIconLoader::MatchBest);
+        list.append(QVariantMap({{"themeName", themeName}, {"iconPath", iconPath}}));
+    }
+    return list;
+}