diff -r c5830bce1c23 -r e07425ac5834 src/main.cpp
--- a/src/main.cpp	Wed Jul 20 12:59:07 2022 +0300
+++ b/src/main.cpp	Wed Jul 20 21:34:56 2022 +0300
@@ -471,19 +471,29 @@
 	const auto executeAction = [&](
 		Model* model, const ModelAction& action
 	) {
-		/*
 		std::visit(overloaded{
 			[model](const AppendToModel& action){
-				model->append(action.newElement);
+				QTextCursor cursor{model};
+				cursor.movePosition(QTextCursor::End);
+				const QString newText = modelElementToString(action.newElement);
+				// Make sure we have an empty line
+				if (not model->lastBlock().text().isEmpty()) {
+					cursor.insertBlock();
+				}
+				qDebug() << cursor.blockNumber();
+				cursor.insertText(newText);
 			},
-			[model](const DeleteFromModel& action){
-					model->remove(action.position);
-			},
+			[](const DeleteFromModel&){},
 			[model](const ModifyModel& action){
-				model->assignAt(action.position, action.newElement);
+				QTextBlock block = model->findBlockByLineNumber((int) action.position);
+				if (block.isValid()) {
+					QTextCursor cursor{block};
+					cursor.select(QTextCursor::LineUnderCursor);
+					cursor.insertText(modelElementToString(action.newElement));
+				}
+				//model->assignAt(action.position, action.newElement);
 			},
 		}, action);
-		*/
 		
 	};
 	const auto restoreSettings = [&]{