Index: binaries/data/config/default.cfg
===================================================================
--- binaries/data/config/default.cfg
+++ binaries/data/config/default.cfg
@@ -307,6 +307,7 @@
 batchtrain = Shift           ; Modifier to train units in batches
 massbarter = Shift           ; Modifier to barter bunch of resources
 masstribute = Shift          ; Modifier to tribute bunch of resources
+assignall = Shift            ; Modifier to assign all idle villagers to a selected task using the command button.
 noconfirmation = Shift       ; Do not ask confirmation when deleting a building/unit
 fulltradeswap = Shift        ; Modifier to put the desired trade resource to 100%
 unloadtype = Shift           ; Modifier to unload all units of type
Index: binaries/data/mods/public/gui/session/selection_panels.js
===================================================================
--- binaries/data/mods/public/gui/session/selection_panels.js
+++ binaries/data/mods/public/gui/session/selection_panels.js
@@ -129,7 +129,7 @@
 			if (data.item.callback)
 				data.item.callback(data.item);
 			else
-				performCommand(data.unitEntStates, data.item.name);
+				performCommand(data.unitEntStates, data.item.name, data.item.data);
 		};
 
 		data.countDisplay.caption = data.item.count || "";
@@ -137,7 +137,8 @@
 		data.button.enabled =
 			g_IsObserver && data.item.name == "focus-rally" ||
 			controlsPlayer(data.player) && (data.item.name != "delete" ||
-				data.unitEntStates.some(state => !isUndeletable(state)));
+				data.unitEntStates.some(state => !isUndeletable(state))) &&
+			(!data.item.active || data.item.active == "true");
 
 		data.icon.sprite = "stretched:session/icons/" + data.item.icon;
 
Index: binaries/data/mods/public/gui/session/selection_panels_helpers.js
===================================================================
--- binaries/data/mods/public/gui/session/selection_panels_helpers.js
+++ binaries/data/mods/public/gui/session/selection_panels_helpers.js
@@ -232,7 +232,7 @@
 		Engine.HotkeyIsPressed("session.deselectgroup") || deselectGroup);
 }
 
-function performCommand(entStates, commandName)
+function performCommand(entStates, commandName, data)
 {
 	if (!entStates.length)
 		return;
@@ -244,7 +244,7 @@
 		return;
 
 	if (g_EntityCommands[commandName])
-		g_EntityCommands[commandName].execute(entStates);
+		g_EntityCommands[commandName].execute(entStates, data);
 }
 
 function performAllyCommand(entity, commandName)
@@ -355,6 +355,13 @@
 	});
 }
 
+function assignIdleVillager(data)
+{
+	let targets = Object.keys(data);
+	for (let target of targets)
+		g_UnitActions[data[target].action].execute(undefined, { "type": data[target].action, "target": +target }, data[target].entities, Engine.HotkeyIsPressed("session.queue"));
+}
+
 function unloadTemplate(template, owner)
 {
 	Engine.PostNetworkCommand({
Index: binaries/data/mods/public/gui/session/unit_actions.js
===================================================================
--- binaries/data/mods/public/gui/session/unit_actions.js
+++ binaries/data/mods/public/gui/session/unit_actions.js
@@ -1014,6 +1014,83 @@
  */
 var g_EntityCommands =
 {
+	"assign-idle-villager": {
+		"getInfo": function(entStates)
+		{
+			let workers = Engine.GuiInterfaceCall("FindIdleUnits", {
+				"idleClasses": g_WorkerTypes,
+				"excludeUnits": []
+			});
+			if (!workers.length)
+				return {
+					"tooltip": colorizeHotkey("%(hotkey)s" + " ", "session.assignidlevillager") +
+					           translate("There are no idle villagers."),
+					"icon": "production.png",
+					"active": "false"
+				};
+
+			// Object of the form: { "targetEntityID": { "action": toPerform, "entities": [toAssign] } }.
+			let assignmentData = {};
+			for (let entState of entStates)
+			{
+				let maxWorkers;
+				let action;
+				let filteredWorkers;
+
+				if (entState.foundation || entState.needsRepair)
+					action = "repair";
+
+				if (entState.resourceSupply && entState.resourceSupply.maxGatherers - entState.resourceSupply.numGatherers > 0)
+				{
+					action = "gather";
+					maxWorkers = entState.resourceSupply.maxGatherers - entState.resourceSupply.numGatherers;
+				}
+				filteredWorkers = workers.filter(worker =>
+					["preSelectedActionCheck", "hotkeyActionCheck", "actionCheck"].some(method =>
+					g_UnitActions[action] &&
+					g_UnitActions[action][method] &&
+					g_UnitActions[action][method](entState.id, [worker])
+				));
+				if (maxWorkers)
+					filteredWorkers.slice(0, maxWorkers);
+
+				// No appropriate idle workers.
+				if (!filteredWorkers.length)
+					continue;
+
+				// If not all workers are desired select only the first.
+				// Could be improved to use the closest?
+				if (!Engine.HotkeyIsPressed("session.assignall"))
+					filteredWorkers = [filteredWorkers[0]];
+
+				assignmentData[entState.id] = {
+					"action": action,
+					"entities": filteredWorkers
+				};
+				// Exclude the previously used workers.
+				workers = workers.filter(worker => filteredWorkers.indexOf(worker) == -1);
+			}
+			if (!Object.keys(assignmentData).length)
+				return {
+						"tooltip": colorizeHotkey("%(hotkey)s" + " ", "session.assignidlevillager") +
+						           translate("There are no appropriate idle villagers that can be assigned."),
+						"icon": "production.png",
+						"active": "false"
+					};
+
+			return {
+				"tooltip": colorizeHotkey("%(hotkey)s" + " ", "session.assignidlevillager") +
+				           translate("Assign an idle villager to work on this entity."),
+				"icon": "production.png",
+				"data": assignmentData
+			};
+		},
+		"execute": function(entStates, data)
+		{
+			assignIdleVillager(data, Engine.HotkeyIsPressed("session.assignall"));
+		},
+	},
+
 	"unload-all": {
 		"getInfo": function(entStates)
 		{