Index: binaries/data/config/default.cfg
===================================================================
--- binaries/data/config/default.cfg
+++ binaries/data/config/default.cfg
@@ -147,8 +147,9 @@
 togglefullscreen = "Alt+Return"          ; Toggle fullscreen/windowed mode
 screenshot.watermark = "Alt+K"           ; Toggle product/company watermark for official screenshots
 wireframe = "Alt+W"                      ; Toggle wireframe mode
-silhouettes = "Alt+S"                    ; Toggle unit silhouettes
+silhouettes = "Ctrl+Alt+S"               ; Toggle unit silhouettes
 showsky = "Alt+Z"                        ; Toggle sky
+summary = "Alt+S"                        ; Toggle in-game summary
 
 ; > CLIPBOARD CONTROLS
 copy = "Ctrl+C"                       ; Copy to clipboard
@@ -323,6 +324,10 @@
 fastforward = Space               ; If timewarp mode enabled, speed up the game
 rewind = Backspace                ; If timewarp mode enabled, go back to earlier point in the game
 
+[hotkey.tab]
+next = "Tab"                      ; Show next tab
+prev = "Shift+Tab"                ; Show previous tab
+
 [hotkey.text]    ; > GUI TEXTBOX HOTKEYS
 delete.left = "Ctrl+Backspace"    ; Delete word to the left of cursor
 delete.right = "Ctrl+Del"         ; Delete word to the right of cursor
Index: binaries/data/mods/public/gui/common/functions_utility.js
===================================================================
--- binaries/data/mods/public/gui/common/functions_utility.js
+++ binaries/data/mods/public/gui/common/functions_utility.js
@@ -246,3 +246,23 @@
 	for (let i = start; i < objects.length; ++i)
 		objects[i].hidden = true;
 }
+
+/**
+ * Use mouse wheel over tabs to scroll to the next/previous tab.
+ */
+function setTabsSwitchMouseWheel(tabs, forward, backward)
+{
+	for (let tab of tabs)
+	{
+		tab.onMouseWheelUp = forward;
+		tab.onMouseWheelDown = backward;
+	}
+}
+
+/**
+ * Calculate next/previous index in an array, with wrapping on begin and end.
+ */
+function nextIndex(index, indexArray, direction)
+{
+	return index + direction < 0 ? indexArray.length -1 : (index + direction) % indexArray.length;
+}
Index: binaries/data/mods/public/gui/credits/credits.js
===================================================================
--- binaries/data/mods/public/gui/credits/credits.js
+++ binaries/data/mods/public/gui/credits/credits.js
@@ -1,6 +1,7 @@
 var g_PanelNames = ["special", "programming", "art", "translators", "misc", "donators"];
 var g_ButtonNames = {};
 var g_PanelTexts = {};
+var g_ViewPanel = 0;
 
 function init()
 {
@@ -21,9 +22,13 @@
 	selectPanel(0);
 }
 
-function placeButtons()
+function nextPanel(direction)
 {
+	selectPanel(nextIndex(g_ViewPanel, g_PanelNames, direction));
+}
 
+function placeButtons()
+{
 	for (let i = 0; i < g_PanelNames.length; ++i)
 	{
 		let button = Engine.GetGUIObjectByName("creditsPanelButton[" + i + "]");
@@ -32,6 +37,8 @@
 			warn("Could not display some credits.");
 			break;
 		}
+		button.onMouseWheelUp = () => nextPanel(1);
+		button.onMouseWheelDown = () => nextPanel(-1);
 		button.hidden = false;
 		let size = button.size;
 		size.top = i * 35;
@@ -83,6 +90,7 @@
 
 function selectPanel(i)
 {
+	g_ViewPanel = i;
 	Engine.GetGUIObjectByName("creditsPanelButtons").children.forEach((button, j) => {
 		button.sprite = i == j ? "ModernTabVerticalForeground" : "ModernTabVerticalBackground";
 	});
Index: binaries/data/mods/public/gui/credits/credits.xml
===================================================================
--- binaries/data/mods/public/gui/credits/credits.xml
+++ binaries/data/mods/public/gui/credits/credits.xml
@@ -8,11 +8,20 @@
 
 <objects>
 	<script file="gui/common/functions_global_object.js"/>
+	<script file="gui/common/functions_utility.js"/>
 	<script directory="gui/credits/"/>
 
 	<!-- Add a translucent black background to fade out the menu page -->
 	<object type="image" z="0" sprite="ModernFade"/>
 
+	<object hotkey="tab.next">
+		<action on="Press">nextPanel(1);</action>
+	</object>
+
+	<object hotkey="tab.prev">
+		<action on="Press">nextPanel(-1);</action>
+	</object>
+
 	<object type="image" style="ModernDialog" size="50%-473 24 50%+473 100%-24">
 		<object style="ModernLabelText" name="dialogTitle" type="text" size="50%-128 -18 50%+128 14">
 			<translatableAttribute id="caption">0 A.D. Credits</translatableAttribute>
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
@@ -49,6 +49,8 @@
 Shift + F11: Save current profiler data to "logs/profile.txt"
 F2: Take screenshot (in .png 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)
 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)
+Tab: Forward switch to next tab.
+Shift + Tab: Backward switch to previous tab.
 
 [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)
@@ -84,6 +86,7 @@
 PageUp with units selected: Highlights the units/buildings guarded by the selection.
 PageDown with units/buildings selected: Highlights the units guarding the selection.
 Tab: See all status bars (which would also show the building progress)
+Alt + S: Toggle summary window.
 
 [font="sans-bold-14"]Modify mouse action
 [font="sans-14"]Ctrl + Right Click on building: Garrison
@@ -106,7 +109,7 @@
 [font="sans-14"]Alt + G: Hide/show the GUI
 Alt + D: Show/hide developer overlay (with developer options)
 Alt + W: Toggle wireframe mode (press once to get wireframes overlaid over the textured models, twice to get just the wireframes colored by the textures, thrice to get back to normal textured mode)
-Alt + S: Toggle unit silhouettes (might give a small performance boost)
+Ctrl + Alt + S: Toggle unit silhouettes (might give a small performance boost)
 Alt + Z: Toggle sky
 Alt + V: Toggle aura range visualizations of selected units and structures
 Alt + B: Toggle heal range visualizations of selected units
Index: binaries/data/mods/public/gui/options/options.js
===================================================================
--- binaries/data/mods/public/gui/options/options.js
+++ binaries/data/mods/public/gui/options/options.js
@@ -160,6 +160,12 @@
 	};
 }
 
+function nextCategory(direction)
+{
+	g_SelectedCategory = nextIndex(g_SelectedCategory, Object.keys(g_Options), direction);
+	displayOptions();
+}
+
 function placeTabButtons()
 {
 	for (let category in g_Options)
@@ -171,6 +177,8 @@
 			break;
 		}
 
+		button.onMouseWheelUp = () => nextCategory(1);
+		button.onMouseWheelDown = () => nextCategory(-1);
 		button.hidden = false;
 
 		let size = button.size;
Index: binaries/data/mods/public/gui/options/options.xml
===================================================================
--- binaries/data/mods/public/gui/options/options.xml
+++ binaries/data/mods/public/gui/options/options.xml
@@ -3,11 +3,20 @@
 <objects>
 
 	<script file="gui/common/functions_global_object.js"/>
+	<script file="gui/common/functions_utility.js"/>
 	<script file="gui/options/options.js"/>
 
 	<!-- Add a translucent black background to fade out the menu page -->
 	<object type="image" sprite="ModernFade"/>
 
+	<object hotkey="tab.next">
+		<action on="Press">nextCategory(1);</action>
+	</object>
+
+	<object hotkey="tab.prev">
+		<action on="Press">nextCategory(-1);</action>
+	</object>
+
 	<!-- Settings Window -->
 	<object name="options" type="image" style="ModernDialog" size="50%-350 50%-316 50%+350 50%+316">
 
Index: binaries/data/mods/public/gui/replaymenu/replay_actions.js
===================================================================
--- binaries/data/mods/public/gui/replaymenu/replay_actions.js
+++ binaries/data/mods/public/gui/replaymenu/replay_actions.js
@@ -127,7 +127,8 @@
 			"isReplay": true,
 			"replayDirectory": g_ReplaysFiltered[selected].directory,
 			"replaySelectionData": createReplaySelectionData(g_ReplaysFiltered[selected].directory)
-		}
+		},
+		"viewPanel": g_SummaryViewPanel
 	});
 }
 
Index: binaries/data/mods/public/gui/replaymenu/replay_menu.js
===================================================================
--- binaries/data/mods/public/gui/replaymenu/replay_menu.js
+++ binaries/data/mods/public/gui/replaymenu/replay_menu.js
@@ -49,6 +49,11 @@
 var g_ReplaysLoaded = false;
 
 /**
+ * Remember the name of the currently opened view panel.
+ */
+var g_SummaryViewPanel = "";
+
+/**
  * Initializes globals, loads replays and displays the list.
  */
 function init(data)
@@ -69,6 +74,9 @@
 
 	initHotkeyTooltips();
 	displayReplayList();
+
+	if (data && data.summaryViewPanel)
+		g_SummaryViewPanel = data.summaryViewPanel;
 }
 
 /**
Index: binaries/data/mods/public/gui/replaymenu/replay_menu.xml
===================================================================
--- binaries/data/mods/public/gui/replaymenu/replay_menu.xml
+++ binaries/data/mods/public/gui/replaymenu/replay_menu.xml
@@ -254,7 +254,7 @@
 			</object>
 
 			<!-- Summary Button -->
-			<object name="summaryButton" type="button" style="StoneButton" size="65%-50 0 82%-50 100%">
+			<object name="summaryButton" type="button" style="StoneButton" size="65%-50 0 82%-50 100%" hotkey="summary">
 				<translatableAttribute id="caption">Summary</translatableAttribute>
 				<action on="Press">showReplaySummary();</action>
 			</object>
Index: binaries/data/mods/public/gui/session/hotkeys/misc.xml
===================================================================
--- binaries/data/mods/public/gui/session/hotkeys/misc.xml
+++ binaries/data/mods/public/gui/session/hotkeys/misc.xml
@@ -28,6 +28,10 @@
 		<action on="Press">toggleTrade();</action>
 	</object>
 
+	<object hotkey="summary">
+		<action on="Press">openGameSummary();</action>
+	</object>
+
 	<object hotkey="silhouettes">
 		<action on="Press">toggleConfigBool("silhouettes");</action>
 	</object>
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
@@ -58,6 +58,11 @@
  */
 var g_BribeButtonsWaiting = {};
 
+/**
+ * Remember the name of the currently opened view panel.
+ */
+var g_SummaryViewPanel = "";
+
 // Redefined every time someone makes a tribute (so we can save some data in a closure). Called in input.js handleInputBeforeGui.
 var g_FlushTributing = function() {};
 
@@ -1068,7 +1073,8 @@
 		"gui": {
 			"isInGame": true
 		},
-		"callback": "resumeGame"
+		"viewPanel": g_SummaryViewPanel,
+		"callback": "resumeGameAndSaveSummaryViewPanel"
 	});
 }
 
@@ -1116,6 +1122,12 @@
 	pauseGame(false, explicit);
 }
 
+function resumeGameAndSaveSummaryViewPanel(data)
+{
+    g_SummaryViewPanel = data.viewPanel;
+    resumeGame(data.explicitResume);
+}
+
 /**
  * Called when the current player toggles a pause button.
  */
Index: binaries/data/mods/public/gui/summary/layout.js
===================================================================
--- binaries/data/mods/public/gui/summary/layout.js
+++ binaries/data/mods/public/gui/summary/layout.js
@@ -210,6 +210,16 @@
 	}
 };
 
+/*
+ * Array of the panel button names.
+ */
+var g_PanelButtons = Object.keys(g_ScorePanelsData).concat(["charts"]).map(k => k + "PanelButton");
+
+/*
+ * Remember the name of the currently opened view panel.
+ */
+var g_ViewPanel = g_PanelButtons[0];
+
 function getColoredTypeTranslation(type)
 {
 	return g_SummaryTypes[type].color ? '[color="' + g_SummaryTypes[type].color + '"]' + g_SummaryTypes[type].caption + '[/color]' : g_SummaryTypes[type].caption;
Index: binaries/data/mods/public/gui/summary/summary.js
===================================================================
--- binaries/data/mods/public/gui/summary/summary.js
+++ binaries/data/mods/public/gui/summary/summary.js
@@ -125,6 +125,16 @@
 	"type": [0, 0]
 };
 
+/*
+ * Show next/previous panel.
+ * @param {integer} direction - 1/-1 forward, backward panel.
+ */
+function nextPanel(direction)
+{
+	selectPanel(Engine.GetGUIObjectByName(g_PanelButtons[nextIndex(
+		g_PanelButtons.indexOf(g_ViewPanel), g_PanelButtons, direction)]));
+}
+
 function selectPanel(panel)
 {
 	// TODO: move panel buttons to a custom parent object
@@ -146,6 +156,8 @@
 		updatePanelData(g_ScorePanelsData[panel.name.substr(0, panel.name.length - "PanelButton".length)]);
 	else
 		[0, 1].forEach(updateCategoryDropdown);
+
+	g_ViewPanel = panel.name;
 }
 
 function initCharts()
@@ -380,10 +392,11 @@
 function continueButton()
 {
 	if (g_GameData.gui.isInGame)
-		Engine.PopGuiPageCB(0);
+		Engine.PopGuiPageCB({ "explicitResume": 0, "viewPanel": g_ViewPanel });
 	else if (g_GameData.gui.isReplay)
 		Engine.SwitchGuiPage("page_replaymenu.xml", {
-			"replaySelectionData": g_GameData.gui.replaySelectionData
+			"replaySelectionData": g_GameData.gui.replaySelectionData,
+			"summaryViewPanel": g_ViewPanel
 		});
 	else if (Engine.HasXmppClient())
 		Engine.SwitchGuiPage("page_lobby.xml");
@@ -422,6 +435,9 @@
 	g_GameData = data;
 	let assignedState = g_GameData.sim.playerStates[g_GameData.gui.assignedPlayer || -1];
 
+	if (data && data.viewPanel)
+		g_ViewPanel = data.viewPanel;
+
 	Engine.GetGUIObjectByName("summaryText").caption =
 		g_GameData.gui.isInGame ?
 			translate("Current Scores") :
@@ -485,5 +501,7 @@
 	calculateTeamCounterDataHelper();
 
 	initCharts();
-	selectPanel(Engine.GetGUIObjectByName("scorePanelButton"));
+	selectPanel(Engine.GetGUIObjectByName(g_ViewPanel));
+	setTabsSwitchMouseWheel(g_PanelButtons.map(k => Engine.GetGUIObjectByName(k)),
+		() => nextPanel(1), () => nextPanel(-1))
 }
Index: binaries/data/mods/public/gui/summary/summary.xml
===================================================================
--- binaries/data/mods/public/gui/summary/summary.xml
+++ binaries/data/mods/public/gui/summary/summary.xml
@@ -15,6 +15,18 @@
 	<!-- Needs the colors from summary.js -->
 	<script file="gui/summary/layout.js"/>
 
+	<object hotkey="summary">
+		<action on="Press">continueButton();</action>
+	</object>
+
+	<object hotkey="tab.next">
+		<action on="Press">nextPanel(1);</action>
+	</object>
+
+	<object hotkey="tab.prev">
+		<action on="Press">nextPanel(-1);</action>
+	</object>
+
 	<object name="summaryWindow"
 		type="image"
 		style="ModernWindow"