diff --git a/source/app.d b/source/app.d
index 64322c7..128dea5 100644
--- a/source/app.d
+++ b/source/app.d
@@ -99,6 +99,44 @@ void main(string[] args)
 		fc.destroy();
 	});
 
+	buttonInsert.addOnClicked((Button){
+		TreeIter it = tree.getSelectedIter();
+		auto store = cast(ListStore)tree.getModel();
+
+		if(store !is null){
+			store.insertAfter(it, it);
+			store.setValue(it, 0, 0);
+			foreach(i ; 1..store.getNColumns()){
+				store.setValue(it, cast(int)i, "_");
+			}
+		}
+	});
+
+	buttonDelete.addOnClicked((Button){
+		TreeIter it = tree.getSelectedIter();
+		auto store = cast(ListStore)tree.getModel();
+
+		if(store !is null)
+			store.remove(it);
+	});
+
+	buttonRenumber.addOnClicked((Button){
+		auto store = cast(ListStore)tree.getModel();
+
+		if(store !is null){
+			TreeIter it = new TreeIter();
+			if(store.getIterFirst(it)){
+				int id = 0;
+				do{
+					store.setValue(it, 0, id++);
+					
+				}while(store.iterNext(it));
+			}
+		}
+	});
+
+
+
 	//Open if exists
 	if(args.length>=2 && exists(args[1])){
 		version(Windows)	Open(args[1], tree, cast(Object)window);
@@ -115,14 +153,15 @@ void Save(ref TreeView tree){
 	auto store = cast(ListStore)tree.getModel();
 	if(store !is null){
 		TreeIter it = new TreeIter();
-		store.getIterFirst(it);//TODO: fail if first is null
-		do{
-			std.stdio.write("\t",store.getValueInt(it, 0));
-			foreach(i ; 1..store.getNColumns()){
-				std.stdio.write("\t",store.getValueString(it, i));
-			}
-			writeln();
-		}while(store.iterNext(it));
+		if(store.getIterFirst(it)){
+			do{
+				std.stdio.write("\t",store.getValueInt(it, 0));
+				foreach(i ; 1..store.getNColumns()){
+					std.stdio.write("\t",store.getValueString(it, i));
+				}
+				writeln();
+			}while(store.iterNext(it));
+		}
 	}
 	else
 		writeln("Nothing to save !");