Index: binaries/data/mods/public/gui/common/functions_global_object.js
===================================================================
--- binaries/data/mods/public/gui/common/functions_global_object.js
+++ binaries/data/mods/public/gui/common/functions_global_object.js
@@ -26,7 +26,12 @@
 	g_MessageBoxCallbackArgs = [];
 };
 
-function messageBox(mbWidth, mbHeight, mbMessage, mbTitle, mbButtonCaptions, mbBtnCode, mbCallbackArgs)
+/*
+ * Create message box
+ * @param mbBtnCodeHotkeys - Array with binding hotkey to callback from btnCode by index to "cancel", "confirm" hotkey.
+ */
+function messageBox(mbWidth, mbHeight, mbMessage, mbTitle, mbButtonCaptions, mbBtnCode, mbCallbackArgs,
+	mbBtnCodeHotkeys)
 {
 	if (g_MessageBoxBtnFunctions && g_MessageBoxBtnFunctions.length)
 	{
@@ -37,13 +42,17 @@
 	g_MessageBoxBtnFunctions = mbBtnCode;
 	g_MessageBoxCallbackArgs = mbCallbackArgs || g_MessageBoxCallbackArgs;
 
+	let hotkeys = mbBtnCodeHotkeys || ["cancel"];
+	hotkeys[mbBtnCode && mbBtnCode.length - 1 || 0] = mbBtnCodeHotkeys || "confirm";
+
 	Engine.PushGuiPage("page_msgbox.xml", {
 		"width": mbWidth,
 		"height": mbHeight,
 		"message": mbMessage,
 		"title": mbTitle,
 		"buttonCaptions": mbButtonCaptions,
-		"callback": mbBtnCode && "g_MessageBoxCallbackFunction"
+		"callback": mbBtnCode && "g_MessageBoxCallbackFunction",
+		"hotkeys": hotkeys
 	});
 }
 
Index: binaries/data/mods/public/gui/manual/intro.txt
===================================================================
--- binaries/data/mods/public/gui/manual/intro.txt
+++ binaries/data/mods/public/gui/manual/intro.txt
@@ -51,6 +51,8 @@
 Shift + F2: Take huge screenshot (6400px*4800px, in .bmp format, location is displayed in the top left of the GUI after the file has been saved, and can also be seen in the console/logs if you miss it there)
 Alt + S: Switch to the next tab.
 Alt + W: Switch to the previous tab.
+ESC: Cancel and close message dialog
+Enter: Confirm and close message dialog
 
 [font="sans-bold-14"]In Game
 [font="sans-14"]Double Left Click \[on unit]: Select all of your units of the same kind on the screen (even if they're different ranks)
Index: binaries/data/mods/public/gui/msgbox/msgbox.js
===================================================================
--- binaries/data/mods/public/gui/msgbox/msgbox.js
+++ binaries/data/mods/public/gui/msgbox/msgbox.js
@@ -15,7 +15,18 @@
 
 	// Default behaviour
 	let mbCancelHotkey = Engine.GetGUIObjectByName("mbCancelHotkey");
-	mbCancelHotkey.onPress = Engine.PopGuiPage;
+	let mbConfirmHotkey = Engine.GetGUIObjectByName("mbConfirmHotkey");
+
+	let popGui = (i) =>
+	{
+		if (data.callback)
+			Engine.PopGuiPageCB(i);
+		else
+			Engine.PopGuiPage();
+	};
+
+	// default esc always pop dialog
+	mbCancelHotkey.onPress = popGui;
 
 	// Calculate size
 	let mbLRDiff = data.width / 2;
@@ -29,21 +40,15 @@
 	captions.forEach((caption, i) => {
 		mbButton[i] = Engine.GetGUIObjectByName("mbButton" + (i + 1));
 
-		let action = function()
-		{
-			if (data.callback)
-				Engine.PopGuiPageCB(i);
-			else
-				Engine.PopGuiPage();
-		};
-
 		mbButton[i].caption = caption;
-		mbButton[i].onPress = action;
+		mbButton[i].onPress = () => popGui(i);
 		mbButton[i].hidden = false;
 
-		// Convention: Cancel is the first button
-		if (i == 0)
-			mbCancelHotkey.onPress = action;
+		if (data.hotkeys && data.hotkeys.indexOf("cancel") == i)
+			mbCancelHotkey.onPress = () => popGui(i);
+
+		if (data.hotkeys && data.hotkeys.indexOf("confirm") == i)
+			mbConfirmHotkey.onPress = () => popGui(i);
 	});
 
 	// Distribute buttons horizontally
Index: binaries/data/mods/public/gui/msgbox/msgbox.xml
===================================================================
--- binaries/data/mods/public/gui/msgbox/msgbox.xml
+++ binaries/data/mods/public/gui/msgbox/msgbox.xml
@@ -8,6 +8,7 @@
 	<!-- Fade out the background because it's non-interactable -->
 	<object sprite="ModernFade" type="image" z="0"/>
 	<object name="mbCancelHotkey" hotkey="cancel" />
+	<object name="mbConfirmHotkey" hotkey="confirm" />
 	<object name="mbMain"
 			style="ModernDialog"
 			type="image"
Index: binaries/data/mods/public/gui/session/menu.js
===================================================================
--- binaries/data/mods/public/gui/session/menu.js
+++ binaries/data/mods/public/gui/session/menu.js
@@ -192,7 +192,9 @@
 		translate("Confirmation"),
 		[translate("I will return"), translate("I resign")],
 		[leaveGame, resignGame],
-		[true, false]
+		[true, false],
+		// No hotkey binding wanted here (except escape just leaving message dialog)
+		[]
 	);
 }