diff --git a/levels/chapter_01.json b/levels/chapter_01.json
index 81c6a2d..4e6c18a 100644
--- a/levels/chapter_01.json
+++ b/levels/chapter_01.json
@@ -5,14 +5,7 @@
 			"id": "output",
 			"name": "Zero",
 			"description": "learn how to output data",
-			"init_board": {
-				"comments": [
-					{ "text": "Welcome :3", "x": 3, "y": 0 },
-					{ "text": "< This is a marble,\n  it will move down when you start the machine", "x": 3, "y": 2 },
-					{ "text": "< This is an input/output silo\n  when a marble enters it, it disappears\n  and the value it held is added to the level output", "x": 3, "y": 5 }
-				],
-				"grid": "\n\n  o  \n\n\n  I\n\n\n"
-			},
+			"init_board": "\n o \n\n I\n\n",
 			"stages": [{
 				"input": [],
 				"output": [0]
diff --git a/src/board.rs b/src/board.rs
index 0017248..7cfe928 100644
--- a/src/board.rs
+++ b/src/board.rs
@@ -1,24 +1,15 @@
-use raylib::{
-	color::Color,
-	drawing::{RaylibDraw, RaylibDrawHandle},
-	math::Vector2,
-};
 use serde::{Deserialize, Serialize};
 
-use crate::{
-	marble_engine::{
-		grid::{Grid, ResizeDeltas},
-		pos::Pos,
-		tile::Tile,
-	},
-	theme::TILE_TEXTURE_SIZE,
+use crate::marble_engine::{
+	grid::{Grid, ResizeDeltas},
+	pos::Pos,
+	tile::Tile,
 };
 
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 pub struct Comment {
 	text: String,
-	x: i32,
-	y: i32,
+	pos: Pos,
 }
 
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
@@ -71,33 +62,9 @@ impl Board {
 		}
 	}
 
-	pub fn draw_comments(&self, d: &mut RaylibDrawHandle, offset: Vector2, scale: f32) {
-		let tile_size = (TILE_TEXTURE_SIZE * scale) as i32;
-		let font_size = 10 * (scale as i32).max(1);
-		let line_space = 12 * (scale as i32).max(1);
-
-		for comment in &self.comments {
-			let x = comment.x * tile_size + offset.x as i32;
-			let y = comment.y * tile_size + offset.y as i32;
-			for (i, line) in comment.text.lines().enumerate() {
-				let y = y + line_space * i as i32;
-				d.draw_text(&line, x, y, font_size, Color::ORANGE);
-			}
-		}
-	}
-
 	pub fn get_rect(&self, pos: Pos, width: usize, height: usize) -> Self {
-		let comments = self
-			.comments
-			.iter()
-			.filter(|c| c.in_area(pos, width, height))
-			.map(|c| {
-				let mut c = c.clone();
-				c.x -= pos.x as i32;
-				c.y -= pos.y as i32;
-				c
-			})
-			.collect();
+		// TODO filter for comments in the area
+		let comments = self.comments.clone();
 		Self {
 			grid: self.grid.get_rect(pos, width, height),
 			comments,
@@ -105,36 +72,19 @@ impl Board {
 	}
 
 	pub fn paste_board(&mut self, pos: Pos, board: &Board) {
+		// TODO remove overlapping comments
 		self.grid.paste_grid(pos, &board.grid);
-		for c in &board.comments {
-			let mut comment = c.clone();
-			comment.x += pos.x as i32;
-			comment.y += pos.y as i32;
-			self.add_comment(comment);
-		}
-	}
-
-	pub fn add_comment(&mut self, comment: Comment) {
-		if self.comments.iter().any(|c| c == &comment) {
-			return;
-		}
-		self.comments.push(comment);
+		self.comments.extend_from_slice(&board.comments);
 	}
 
 	pub fn grow(&mut self, deltas: &ResizeDeltas) {
 		self.grid.grow(deltas);
-		for c in &mut self.comments {
-			c.x += deltas.x_neg as i32;
-			c.y += deltas.y_neg as i32;
-		}
+		// TODO adjust comments
 	}
 
 	pub fn shrink(&mut self, deltas: &ResizeDeltas) {
 		self.grid.shrink(deltas);
-		for c in &mut self.comments {
-			c.x -= deltas.x_neg as i32;
-			c.y -= deltas.y_neg as i32;
-		}
+		// TODO adjust comments
 	}
 
 	pub fn from_user_str(source: &str) -> Self {
@@ -152,12 +102,3 @@ impl Board {
 		self.grid.height()
 	}
 }
-
-impl Comment {
-	fn in_area(&self, pos: Pos, width: usize, height: usize) -> bool {
-		self.x >= pos.x as i32
-			&& self.y >= pos.y as i32
-			&& self.x < pos.x as i32 + width as i32
-			&& self.y < pos.y as i32 + height as i32
-	}
-}
diff --git a/src/editor.rs b/src/editor.rs
index 003d6b1..21d7352 100644
--- a/src/editor.rs
+++ b/src/editor.rs
@@ -146,7 +146,7 @@ impl Editor {
 			machine,
 			sim_state: SimState::Editing,
 			view_offset: Vector2::zero(),
-			zoom: 2.,
+			zoom: 1.,
 			active_tool: Tool::None,
 			output_as_text,
 			input_as_text,
@@ -553,7 +553,7 @@ impl Editor {
 						self.pasting_board = Some(b);
 					}
 				} else if rl.is_key_pressed(KeyboardKey::KEY_Z) {
-					self.undo();
+					self.undo()
 				} else if rl.is_key_pressed(KeyboardKey::KEY_Y) {
 					self.redo();
 				}
@@ -584,10 +584,6 @@ impl Editor {
 					.draw_marble_values(d, textures, self.view_offset, self.zoom);
 			}
 		}
-		if self.draw_overlay {
-			self.source_board
-				.draw_comments(d, self.view_offset, self.zoom);
-		}
 	}
 
 	pub fn draw(&mut self, d: &mut RaylibDrawHandle, textures: &Textures) {
diff --git a/src/marble_engine.rs b/src/marble_engine.rs
index e18c13f..89aad50 100644
--- a/src/marble_engine.rs
+++ b/src/marble_engine.rs
@@ -529,10 +529,6 @@ impl Machine {
 		}
 		#[cfg(debug_assertions)]
 		{
-			self.debug_subticks.push(DebugSubTick {
-				grid: self.grid.clone(),
-				pos: None,
-			});
 			self.subtick_index = self.debug_subticks.len() - 1;
 		}
 	}