diff --git a/brmbar3/brmbar-gui-qt4/BarButton.qml b/brmbar3/brmbar-gui-qt4/BarButton.qml
index 494b1a0..a3451fb 100644
--- a/brmbar3/brmbar-gui-qt4/BarButton.qml
+++ b/brmbar3/brmbar-gui-qt4/BarButton.qml
@@ -9,7 +9,7 @@ Rectangle {
     border.color: btnColor
 
     property string text: "Button"
-    property int fontSize: 60
+    property int fontSize: 0.768 * 60
     property variant btnColor: "#ffffff"
 
     signal buttonClick
diff --git a/brmbar3/brmbar-gui-qt4/BarClock.qml b/brmbar3/brmbar-gui-qt4/BarClock.qml
index 45ea69c..c348457 100644
--- a/brmbar3/brmbar-gui-qt4/BarClock.qml
+++ b/brmbar3/brmbar-gui-qt4/BarClock.qml
@@ -7,7 +7,7 @@ Rectangle {
     height: 65
     property variant now: new Date()
     property variant textColor: "#000000"
-    property variant textSize: 16
+    property variant textSize: 0.768 * 16
     Timer {
         id: clockUpdater
         interval: 1000 // update clock every second
diff --git a/brmbar3/brmbar-gui-qt4/BarKeyboard.qml b/brmbar3/brmbar-gui-qt4/BarKeyboard.qml
index f0967b1..77fac0f 100644
--- a/brmbar3/brmbar-gui-qt4/BarKeyboard.qml
+++ b/brmbar3/brmbar-gui-qt4/BarKeyboard.qml
@@ -25,7 +25,7 @@ Grid {
 	    property bool special: key == "^" || key == "<"
 
             text: key == "^" ? "shift" : key == "<" ? "bksp" : key
-            fontSize: special ? 27 : 60
+            fontSize: 0.768 * (special ? 27 : 60)
 
             onButtonClick: {
 		if (key == "^")
diff --git a/brmbar3/brmbar-gui-qt4/BarTextHint.qml b/brmbar3/brmbar-gui-qt4/BarTextHint.qml
index dcb10fc..872a7bf 100644
--- a/brmbar3/brmbar-gui-qt4/BarTextHint.qml
+++ b/brmbar3/brmbar-gui-qt4/BarTextHint.qml
@@ -19,7 +19,7 @@ Item {
         anchors.bottomMargin: 0
         anchors.top: parent.top
         anchors.topMargin: 0
-        font.pixelSize: 60
+        font.fontSize: 0.768 * 60
     }
 
     Text {
@@ -33,6 +33,6 @@ Item {
         anchors.topMargin: 0
         anchors.right: parent.right
         anchors.rightMargin: 0
-        transformOrigin: Item.Center; smooth: true; font.bold: false; wrapMode: Text.NoWrap; font.pixelSize: 60;horizontalAlignment: Text.AlignHCenter
+        transformOrigin: Item.Center; smooth: true; font.bold: false; wrapMode: Text.NoWrap; font.fontSize: 0.768 * 60;horizontalAlignment: Text.AlignHCenter
     }
 }
diff --git a/brmbar3/brmbar-gui-qt4/BarcodeInput.qml b/brmbar3/brmbar-gui-qt4/BarcodeInput.qml
index 908902e..d36e0f0 100644
--- a/brmbar3/brmbar-gui-qt4/BarcodeInput.qml
+++ b/brmbar3/brmbar-gui-qt4/BarcodeInput.qml
@@ -12,7 +12,7 @@ TextInput {
     transformOrigin: Item.Center
     visible: true
     opacity: 0
-    font.pixelSize: 12
+    font.fontSize: 0.768 * 12
     focus: true
     validator: RegExpValidator { regExp: /..*/ } /* non-empty strings; barcode readers send empty lines, ignore these */
 }
diff --git a/brmbar3/brmbar-gui-qt4/BasePage.qml b/brmbar3/brmbar-gui-qt4/BasePage.qml
index 02e0b7a..5de93db 100644
--- a/brmbar3/brmbar-gui-qt4/BasePage.qml
+++ b/brmbar3/brmbar-gui-qt4/BasePage.qml
@@ -12,7 +12,7 @@ Rectangle {
         y: 35
         color: "#71cccc"
         text: "brmbar v3"
-        font.pixelSize: 49
+        font.fontSize: 0.768 * 49
     }
     BarClock {
         id: clock
@@ -20,7 +20,7 @@ Rectangle {
         y: 35
         color: "#000000"
         textColor: "#71cccc"
-        textSize: 49
+        textSize: 0.768 * 49
     }
 
     Image {
@@ -43,7 +43,7 @@ Rectangle {
         text: ""
         horizontalAlignment: Text.AlignHCenter
         //anchors.horizontalCenter: clock.horizontalCenter
-        font.pixelSize: 49
+        font.fontSize: 0.768 * 49
 
         state: "HIDDEN"
         opacity: 0
diff --git a/brmbar3/brmbar-gui-qt4/ChargeCredit.qml b/brmbar3/brmbar-gui-qt4/ChargeCredit.qml
index a65a241..11a9aec 100644
--- a/brmbar3/brmbar-gui-qt4/ChargeCredit.qml
+++ b/brmbar3/brmbar-gui-qt4/ChargeCredit.qml
@@ -21,7 +21,7 @@ Item {
         wrapMode: Text.WordWrap
         horizontalAlignment: Text.AlignRight
         verticalAlignment: Text.AlignVCenter
-        font.pixelSize: 60
+        font.fontSize: 0.768 * 60
     }
 
     Text {
@@ -34,7 +34,7 @@ Item {
         text: parent.amount
         horizontalAlignment: Text.AlignRight
         verticalAlignment: Text.AlignVCenter
-        font.pixelSize: 122
+        font.fontSize: 0.768 * 122
     }
 
     BarTextHint {
@@ -82,7 +82,7 @@ Item {
         y: 582
         width: 360
         text: "Charge"
-        fontSize: 60
+        fontSize: 0.768 * 60
         visible: parent.amount && parent.userdbid
         onButtonClick: {
             parent.chargeCredit()
diff --git a/brmbar3/brmbar-gui-qt4/ItemEdit.qml b/brmbar3/brmbar-gui-qt4/ItemEdit.qml
index bcb8d82..33b8358 100644
--- a/brmbar3/brmbar-gui-qt4/ItemEdit.qml
+++ b/brmbar3/brmbar-gui-qt4/ItemEdit.qml
@@ -55,7 +55,7 @@ Item {
 	    text: page.item_name
 	    wrapMode: Text.WordWrap
 	    verticalAlignment: Text.AlignVCenter
-	    font.pixelSize: 46
+	    font.fontSize: 0.768 * 46
 	}
 
 	BarButton {
@@ -64,7 +64,7 @@ Item {
 	    y: 0
 	    width: 240
 	    height: 60
-	    fontSize: 46
+	    fontSize: 0.768 * 46
 	    text: page.state == "name_edit" ? "Assign" : "Edit"
 	    onButtonClick: { if (page.state == "name_edit") page.state = "normal"; else page.state = "name_edit"; }
 	}
@@ -97,7 +97,7 @@ Item {
 	    color: "#ffffff"
 	    text: "Buy price:"
 	    verticalAlignment: Text.AlignVCenter
-	    font.pixelSize: 46
+	    font.fontSize: 0.768 * 46
 	}
 
 	Text {
@@ -110,7 +110,7 @@ Item {
 	    text: page.buy_price
 	    horizontalAlignment: Text.AlignRight
 	    verticalAlignment: Text.AlignVCenter
-	    font.pixelSize: 46
+	    font.fontSize: 0.768 * 46
 	}
 
 	BarButton {
@@ -119,7 +119,7 @@ Item {
 	    y: 0
 	    width: 240
 	    height: 60
-	    fontSize: 46
+	    fontSize: 0.768 * 46
 	    text: page.state == "buyprice_edit" ? "Assign" : "Edit"
 	    onButtonClick: { if (page.state == "buyprice_edit") page.state = "normal"; else page.state = "buyprice_edit"; }
 	}
@@ -152,7 +152,7 @@ Item {
 	    color: "#ffffff"
 	    text: "Sell price:"
 	    verticalAlignment: Text.AlignVCenter
-	    font.pixelSize: 46
+	    font.fontSize: 0.768 * 46
 	}
 
 	Text {
@@ -165,7 +165,7 @@ Item {
 	    text: page.price
 	    horizontalAlignment: Text.AlignRight
 	    verticalAlignment: Text.AlignVCenter
-	    font.pixelSize: 46
+	    font.fontSize: 0.768 * 46
 	}
 
 	BarButton {
@@ -174,7 +174,7 @@ Item {
 	    y: 0
 	    width: 240
 	    height: 60
-	    fontSize: 46
+	    fontSize: 0.768 * 46
 	    text: page.state == "sellprice_edit" ? "Assign" : "Edit"
 	    onButtonClick: { if (page.state == "sellprice_edit") page.state = "normal"; else page.state = "sellprice_edit"; }
 	}
@@ -207,7 +207,7 @@ Item {
 	    color: "#ffffff"
 	    text: "Quantity:"
 	    verticalAlignment: Text.AlignVCenter
-	    font.pixelSize: 46
+	    font.fontSize: 0.768 * 46
 	}
 
 	Text {
@@ -220,7 +220,7 @@ Item {
 	    text: info.balance
 	    horizontalAlignment: Text.AlignRight
 	    verticalAlignment: Text.AlignVCenter
-	    font.pixelSize: 46
+	    font.fontSize: 0.768 * 46
 	}
 
 	BarButton {
@@ -229,7 +229,7 @@ Item {
 	    y: 0
 	    width: 240
 	    height: 60
-	    fontSize: 46
+	    fontSize: 0.768 * 46
 	    text: page.state == "balance_edit" ? "Add qty" : "Restock"
 	    onButtonClick: {
 		if (page.state == "balance_edit") {
@@ -267,7 +267,7 @@ Item {
 	    color: "#ffffff"
 	    text: "Add quantity:"
 	    verticalAlignment: Text.AlignVCenter
-	    font.pixelSize: 46
+	    font.fontSize: 0.768 * 46
 	}
 
 	Text {
@@ -279,7 +279,7 @@ Item {
 	    color: "#ffff7c"
 	    text: balance_addqty_edit.enteredText
 	    verticalAlignment: Text.AlignVCenter
-	    font.pixelSize: 60
+	    font.fontSize: 0.768 * 60
 	}
 
 	Text {
@@ -290,7 +290,7 @@ Item {
 	    width: 248
 	    color: "#71cccc"
 	    text: "Please specify the precise amount of newly\nstocked goods, even if the current quantity\nvalue does not match reality (you can let us\nknow about that at brmbar@brmlab.cz)"
-	    font.pixelSize: 27
+	    font.fontSize: 0.768 * 27
 	}
     }
 
diff --git a/brmbar3/brmbar-gui-qt4/ItemInfo.qml b/brmbar3/brmbar-gui-qt4/ItemInfo.qml
index 9ab7906..9a88b4e 100644
--- a/brmbar3/brmbar-gui-qt4/ItemInfo.qml
+++ b/brmbar3/brmbar-gui-qt4/ItemInfo.qml
@@ -20,7 +20,7 @@ Item {
         text: parent.name
         wrapMode: Text.WordWrap
         verticalAlignment: Text.AlignVCenter
-        font.pixelSize: 60
+        font.fontSize: 0.768 * 60
     }
 
     Text {
@@ -33,7 +33,7 @@ Item {
         text: parent.price
         horizontalAlignment: Text.AlignRight
         verticalAlignment: Text.AlignVCenter
-        font.pixelSize: 122
+        font.fontSize: 0.768 * 122
     }
 
     BarTextHint {
@@ -68,7 +68,7 @@ Item {
         y: 582
         width: 360
         text: "Pay by cash"
-        fontSize: 60
+        fontSize: 0.768 * 60
         onButtonClick: {
             shop.sellItemCash(dbid)
             status_text.setStatus("Sold! Put " + price + " Kč in the money box.", "#ffff7c")
diff --git a/brmbar3/brmbar-gui-qt4/MainPage.qml b/brmbar3/brmbar-gui-qt4/MainPage.qml
index e17571a..cb4f980 100644
--- a/brmbar3/brmbar-gui-qt4/MainPage.qml
+++ b/brmbar3/brmbar-gui-qt4/MainPage.qml
@@ -31,7 +31,7 @@ Item {
         y: 430
         width: 360
         text: "Select Item"
-        fontSize: 60
+        fontSize: 0.768 * 60
 	btnColor: "#666666"
     }
 
diff --git a/brmbar3/brmbar-gui-qt4/Management.qml b/brmbar3/brmbar-gui-qt4/Management.qml
index 068b74a..690e713 100644
--- a/brmbar3/brmbar-gui-qt4/Management.qml
+++ b/brmbar3/brmbar-gui-qt4/Management.qml
@@ -21,7 +21,7 @@ Item {
         text: "Profit:"
         wrapMode: Text.WordWrap
         verticalAlignment: Text.AlignVCenter
-        font.pixelSize: 46
+        font.fontSize: 0.768 * 46
     }
 
     Text {
@@ -34,7 +34,7 @@ Item {
         text: parent.profit
         verticalAlignment: Text.AlignVCenter
         horizontalAlignment: Text.AlignRight
-        font.pixelSize: 46
+        font.fontSize: 0.768 * 46
     }
 
     Text {
@@ -47,7 +47,7 @@ Item {
         text: "Cash:"
         wrapMode: Text.WordWrap
         verticalAlignment: Text.AlignVCenter
-        font.pixelSize: 46
+        font.fontSize: 0.768 * 46
     }
 
     Text {
@@ -60,7 +60,7 @@ Item {
         text: parent.cash
         verticalAlignment: Text.AlignVCenter
         horizontalAlignment: Text.AlignRight
-        font.pixelSize: 46
+        font.fontSize: 0.768 * 46
     }
 
     Text {
@@ -73,7 +73,7 @@ Item {
         text: "Credit:"
         wrapMode: Text.WordWrap
         verticalAlignment: Text.AlignVCenter
-        font.pixelSize: 46
+        font.fontSize: 0.768 * 46
     }
 
     Text {
@@ -86,7 +86,7 @@ Item {
         text: parent.credit_money
         verticalAlignment: Text.AlignVCenter
         horizontalAlignment: Text.AlignRight
-        font.pixelSize: 46
+        font.fontSize: 0.768 * 46
     }
 
     Text {
@@ -99,7 +99,7 @@ Item {
         text: "Stock:"
         wrapMode: Text.WordWrap
         verticalAlignment: Text.AlignVCenter
-        font.pixelSize: 46
+        font.fontSize: 0.768 * 46
     }
 
     Text {
@@ -112,7 +112,7 @@ Item {
         text: parent.inv_money
         verticalAlignment: Text.AlignVCenter
         horizontalAlignment: Text.AlignRight
-        font.pixelSize: 46
+        font.fontSize: 0.768 * 46
     }
 
     BarButton {
diff --git a/brmbar3/brmbar-gui-qt4/Receipt.qml b/brmbar3/brmbar-gui-qt4/Receipt.qml
index 905b68e..73801f2 100644
--- a/brmbar3/brmbar-gui-qt4/Receipt.qml
+++ b/brmbar3/brmbar-gui-qt4/Receipt.qml
@@ -44,7 +44,7 @@ Item {
 	    text: page.description
 	    wrapMode: Text.WordWrap
 	    verticalAlignment: Text.AlignVCenter
-	    font.pixelSize: 46
+	    font.fontSize: 0.768 * 46
 	}
 
 	BarButton {
@@ -53,7 +53,7 @@ Item {
 	    y: 0
 	    width: 300
 	    height: 60
-	    fontSize: 46
+	    fontSize: 0.768 * 46
 	    text: page.state == "description_edit" ? "Assign" : "Description"
 	    onButtonClick: { if (page.state == "description_edit") page.state = "normal"; else page.state = "description_edit"; }
 	}
@@ -86,7 +86,7 @@ Item {
 	    color: "#ffffff"
 	    text: "Money Amount:"
 	    verticalAlignment: Text.AlignVCenter
-	    font.pixelSize: 46
+	    font.fontSize: 0.768 * 46
 	}
 
 	Text {
@@ -99,7 +99,7 @@ Item {
 	    text: amount
 	    horizontalAlignment: Text.AlignRight
 	    verticalAlignment: Text.AlignVCenter
-	    font.pixelSize: 46
+	    font.fontSize: 0.768 * 46
 	}
 
 	BarButton {
@@ -108,7 +108,7 @@ Item {
 	    y: 0
 	    width: 240
 	    height: 60
-	    fontSize: 46
+	    fontSize: 0.768 * 46
 	    text: page.state == "amount_edit" ? "Assign" : "Edit"
 	    onButtonClick: { if (page.state == "amount_edit") page.state = "normal"; else page.state = "amount_edit"; }
 	}
@@ -144,7 +144,7 @@ Item {
 	text: "This is for cashing in small brmlab expenses.\nWrite the current date on the receipt and put it to the money box.\nDo not forget to announce this on a meetup and add it to the [[newz]].\nFor restocking brmbar items, please go to the Management view instead."
 	wrapMode: Text.WordWrap
 	horizontalAlignment: Text.AlignHCenter
-	font.pixelSize: 27
+	font.fontSize: 0.768 * 27
     }
 
     BarButton {
diff --git a/brmbar3/brmbar-gui-qt4/StockMgmt.qml b/brmbar3/brmbar-gui-qt4/StockMgmt.qml
index 0fa09c5..09f45bb 100644
--- a/brmbar3/brmbar-gui-qt4/StockMgmt.qml
+++ b/brmbar3/brmbar-gui-qt4/StockMgmt.qml
@@ -44,7 +44,7 @@ Item {
 		    text: modelData.name
 		    anchors.verticalCenter: parent.verticalCenter
 		    color: "#ffffff"
-		    font.pixelSize: 46
+		    font.fontSize: 0.768 * 46
 		}
 
 		Text {
@@ -54,7 +54,7 @@ Item {
 		    color: "#ffff7c"
 		    text: modelData.price
 		    horizontalAlignment: Text.AlignRight
-		    font.pixelSize: 46
+		    font.fontSize: 0.768 * 46
 		}
 
 		BarButton {
@@ -63,7 +63,7 @@ Item {
 		    width: 240
 		    height: 68
 		    text: "Edit"
-		    fontSize: 46
+		    fontSize: 0.768 * 46
 		    onButtonClick: {
 			loadPage("ItemEdit", { dbid: modelData.id })
 		    }
@@ -86,7 +86,7 @@ Item {
         y: 582
         width: 360
         text: "Add Item"
-        fontSize: 60
+        fontSize: 0.768 * 60
         onButtonClick: {
 	    loadPage("ItemEdit", { dbid: "" })
 	}
diff --git a/brmbar3/brmbar-gui-qt4/UserInfo.qml b/brmbar3/brmbar-gui-qt4/UserInfo.qml
index be74e17..21fab13 100644
--- a/brmbar3/brmbar-gui-qt4/UserInfo.qml
+++ b/brmbar3/brmbar-gui-qt4/UserInfo.qml
@@ -19,7 +19,7 @@ Item {
         text: parent.name
         wrapMode: Text.WordWrap
         verticalAlignment: Text.AlignVCenter
-        font.pixelSize: 60
+        font.fontSize: 0.768 * 60
     }
 
     Text {
@@ -32,7 +32,7 @@ Item {
         text: parent.negbalance
         horizontalAlignment: Text.AlignRight
         verticalAlignment: Text.AlignVCenter
-        font.pixelSize: 122
+        font.fontSize: 0.768 * 122
     }
 
     BarcodeInput {
@@ -58,7 +58,7 @@ Item {
         y: 582
         width: 360
         text: "Charge"
-        fontSize: 60
+        fontSize: 0.768 * 60
         onButtonClick: {
             loadPage("ChargeCredit", { "username": name, "userdbid": dbid })
         }
diff --git a/brmbar3/brmbar-gui-qt4/UserMgmt.qml b/brmbar3/brmbar-gui-qt4/UserMgmt.qml
index 27421c3..43ea684 100644
--- a/brmbar3/brmbar-gui-qt4/UserMgmt.qml
+++ b/brmbar3/brmbar-gui-qt4/UserMgmt.qml
@@ -45,7 +45,7 @@ Item {
 		    text: modelData.name
 		    anchors.verticalCenter: parent.verticalCenter
 		    color: "#ffffff"
-		    font.pixelSize: 46
+		    font.fontSize: 0.768 * 46
 		}
 
 		Text {
@@ -55,7 +55,7 @@ Item {
 		    color: "#ffff7c"
 		    text: modelData.negbalance_str
 		    horizontalAlignment: Text.AlignRight
-		    font.pixelSize: 46
+		    font.fontSize: 0.768 * 46
 		}
 
 		BarButton {
@@ -64,7 +64,7 @@ Item {
 		    width: 240
 		    height: 68
 		    text: "Withdraw"
-		    fontSize: 46
+		    fontSize: 0.768 * 46
 		    onButtonClick: {
 			loadPage("Withdraw", { username: modelData.name, userdbid: modelData.id })
 		    }
@@ -87,7 +87,7 @@ Item {
         y: 582
         width: 360
         text: "Add User"
-        fontSize: 60
+        fontSize: 0.768 * 60
 	btnColor: "#666666"
     }
 
diff --git a/brmbar3/brmbar-gui-qt4/Withdraw.qml b/brmbar3/brmbar-gui-qt4/Withdraw.qml
index 2baa6f2..ef814ac 100644
--- a/brmbar3/brmbar-gui-qt4/Withdraw.qml
+++ b/brmbar3/brmbar-gui-qt4/Withdraw.qml
@@ -21,7 +21,7 @@ Item {
         wrapMode: Text.WordWrap
         horizontalAlignment: Text.AlignRight
         verticalAlignment: Text.AlignVCenter
-        font.pixelSize: 60
+        font.fontSize: 0.768 * 60
     }
 
     Text {
@@ -34,7 +34,7 @@ Item {
         text: parent.amount ? "-" + parent.amount : ""
         horizontalAlignment: Text.AlignRight
         verticalAlignment: Text.AlignVCenter
-        font.pixelSize: 122
+        font.fontSize: 0.768 * 122
     }
 
     BarTextHint {
@@ -82,7 +82,7 @@ Item {
         y: 582
         width: 360
         text: "Withdraw"
-        fontSize: 60
+        fontSize: 0.768 * 60
         visible: parent.amount && parent.userdbid
         onButtonClick: {
             parent.withdrawCredit()