diff --git a/TODO.md b/TODO.md
index c8dd3d2d..b17a493d 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,4 +1,4 @@
-- aiofiles Thumbnails
+- Set Qt.application.* stuff from C++
 - Devices and client settings in edit account page
   - Multiaccount aliases
 - If avatar is set, name color from average color?
diff --git a/src/python/config_files.py b/src/python/config_files.py
index ab779666..91eb3fec 100644
--- a/src/python/config_files.py
+++ b/src/python/config_files.py
@@ -11,6 +11,8 @@ from dataclasses import dataclass, field
 
 from .backend import Backend
 
+JsonData = Dict[str, Any]
+
 WRITE_LOCK = asyncio.Lock()
 
 
@@ -27,14 +29,18 @@ class ConfigFile:
 
 @dataclass
 class JSONConfigFile(ConfigFile):
-    async def read(self) -> Dict[str, Any]:
+    async def default_data(self) -> JsonData:
+        return {}
+
+
+    async def read(self) -> JsonData:
         try:
             return json.loads(self.path.read_text())
         except (json.JSONDecodeError, FileNotFoundError):
-            return {}
+            return await self.default_data()
 
 
-    async def write(self, data: Dict[str, Any]) -> None:
+    async def write(self, data: JsonData) -> None:
         js = json.dumps(data, indent=4, ensure_ascii=False, sort_keys=True)
 
         async with WRITE_LOCK:
@@ -76,3 +82,8 @@ class Accounts(JSONConfigFile):
 @dataclass
 class UISettings(JSONConfigFile):
     filename: str = "ui-settings.json"
+
+    async def default_data(self) -> JsonData:
+        return {
+            "write_aliases": {}
+        }
diff --git a/src/qml/Pages/EditAccount/Profile.qml b/src/qml/Pages/EditAccount/Profile.qml
index eeb7ad1c..48daff6b 100644
--- a/src/qml/Pages/EditAccount/Profile.qml
+++ b/src/qml/Pages/EditAccount/Profile.qml
@@ -19,6 +19,11 @@ HGridLayout {
             )
         }
 
+        if (aliasField.changed) {
+            window.settings.write_aliases[userId] = aliasField.field.text
+            window.settingsChanged()
+        }
+
         if (avatar.changed) {
             saveButton.avatarChangeRunning = true
             let path = Qt.resolvedUrl(avatar.imageUrl).replace(/^file:/, "")
@@ -32,6 +37,13 @@ HGridLayout {
         }
     }
 
+    function cancelChanges() {
+        nameField.field.text    = userInfo.displayName
+        aliasField.field.text   = aliasField.currentAlias
+        fileDialog.selectedFile = ""
+        fileDialog.file         = ""
+    }
+
     columns: 2
     flow: window.isWide ? GridLayout.LeftToRight : GridLayout.TopToBottom
     rowSpacing: currentSpacing
@@ -123,6 +135,21 @@ HGridLayout {
                 Layout.fillWidth: true
                 Layout.maximumWidth: 480
             }
+
+            HLabeledTextField {
+                property string currentAlias:
+                    window.settings.write_aliases[userId] || ""
+
+                property bool changed: field.text != currentAlias
+
+                id: aliasField
+                label.text: qsTr("Write alias:")
+                field.text: currentAlias
+                field.onAccepted: applyChanges()
+
+                Layout.fillWidth: true
+                Layout.maximumWidth: 480
+            }
         }
 
         HSpacer {}
@@ -138,7 +165,8 @@ HGridLayout {
                 iconName: "apply"
                 text: qsTr("Apply")
                 loading: nameChangeRunning || avatarChangeRunning
-                enabled: nameField.changed || avatar.changed
+                enabled:
+                    nameField.changed || aliasField.changed || avatar.changed
 
                 Layout.fillWidth: true
                 Layout.alignment: Qt.AlignBottom
@@ -149,16 +177,12 @@ HGridLayout {
             HUIButton {
                 iconName: "cancel"
                 text: qsTr("Cancel")
+                enabled: saveButton.enabled && ! saveButton.loading
 
                 Layout.fillWidth: true
                 Layout.alignment: Qt.AlignBottom
-                enabled: saveButton.enabled && ! saveButton.loading
 
-                onClicked: {
-                    nameField.field.text = userInfo.displayName
-                    fileDialog.selectedFile = ""
-                    fileDialog.file = ""
-                }
+                onClicked: cancelChanges()
             }
         }
     }
diff --git a/src/qml/Python.qml b/src/qml/Python.qml
index a82ea070..0d6d53c1 100644
--- a/src/qml/Python.qml
+++ b/src/qml/Python.qml
@@ -33,6 +33,11 @@ Python {
         call("APP.call_client_coro", [accountId, name, uuid, args])
     }
 
+    function saveSettings(callback=null) {
+        if (! py.ready) { return }  // config not loaded yet
+        callCoro("ui_settings.write", [window.settings], callback)
+    }
+
     Component.onCompleted: {
         for (var func in EventHandlers) {
             if (EventHandlers.hasOwnProperty(func)) {
@@ -46,16 +51,20 @@ Python {
             call("APP.is_debug_on", [Qt.application.arguments], on => {
                 window.debug = on
 
-                callCoro("saved_accounts.any_saved", [], any => {
-                    py.ready = true
-                    willLoadAccounts(any)
+                callCoro("ui_settings.read", [], settings => {
+                    window.settings = settings
 
-                    if (any) {
-                        py.loadingAccounts = true
-                        py.callCoro("load_saved_accounts", [], () => {
-                            py.loadingAccounts = false
-                        })
-                    }
+                    callCoro("saved_accounts.any_saved", [], any => {
+                        py.ready = true
+                        willLoadAccounts(any)
+
+                        if (any) {
+                            py.loadingAccounts = true
+                            py.callCoro("load_saved_accounts", [], () => {
+                                py.loadingAccounts = false
+                            })
+                        }
+                    })
                 })
             })
         })
diff --git a/src/qml/Window.qml b/src/qml/Window.qml
index c29ab563..23b20c6d 100644
--- a/src/qml/Window.qml
+++ b/src/qml/Window.qml
@@ -16,10 +16,6 @@ ApplicationWindow {
     title: "Harmony QML"
     color: "black"
 
-    property bool debug: false
-    property bool ready: false
-    property bool isWide: width > theme.isWideAbove
-
     Component.onCompleted: {
         Qt.application.organization = "harmonyqml"
         Qt.application.name         = "harmonyqml"
@@ -28,6 +24,14 @@ ApplicationWindow {
         window.ready                = true
     }
 
+    property bool debug: false
+    property bool ready: false
+    property bool isWide: width > theme.isWideAbove
+
+    // Note: window.settingsChanged() must be called manually
+    property var settings: ({})
+    onSettingsChanged: py.saveSettings()
+
     Theme { id: theme }
 
     Python { id: py }