Added optional (default off) stacking for creatures in the same way that artifacts, enchantments, and lands are stacked.

forge-gui/src/main/java/forge/control/FControlGameEventHandler.java

@@ -11,6 +11,8 @@ import forge.game.player.Player;
 import forge.game.zone.PlayerZone;
 import forge.game.zone.Zone;
 import forge.game.zone.ZoneType;
+import forge.model.FModel;
+import forge.properties.ForgePreferences.FPref;
 import forge.util.Lang;
 import forge.util.gui.SGuiChoose;
 import forge.util.maps.MapOfLists;
@@ -65,6 +67,12 @@ public class FControlGameEventHandler extends IGameEventVisitor.Base<Void> {
     private final AtomicBoolean turnUpdPlanned = new AtomicBoolean(false);
     @Override
     public Void visit(final GameEventTurnBegan event) {
+
+        if (FModel.getPreferences().getPrefBoolean(FPref.UI_STACK_CREATURES) && event.turnOwner != null) {
+            // anything except stack will get here
+            updateZone(Pair.of(event.turnOwner, ZoneType.Battlefield));
+        }
+        
         if (turnUpdPlanned.getAndSet(true)) { return null; }
 
         final Game game = GuiBase.getInterface().getGame(); // to make sure control gets a correct game instance

forge-gui/src/main/java/forge/properties/ForgePreferences.java

@@ -47,6 +47,7 @@ public class ForgePreferences extends PreferencesStore<ForgePreferences.FPref> {
         UI_OVERLAY_FOIL_EFFECT ("true"),
         UI_HIDE_REMINDER_TEXT ("false"),
         UI_OPEN_PACKS_INDIV ("false"),
+        UI_STACK_CREATURES ("false"),
         UI_UPLOAD_DRAFT ("false"),
         UI_SCALE_LARGER ("true"),
         UI_LARGE_CARD_VIEWERS ("false"),