diff --git a/src/app.js b/src/app.js
index c931858..c4dfe0d 100644
--- a/src/app.js
+++ b/src/app.js
@@ -157,7 +157,10 @@ storage.get({
 	$canvas_area.trigger("resize");
 });
 
-$G.on("resize", update_grid); // for browser zoom, and in-app zoom of the canvas
+$G.on("resize", function(){ // for browser zoom, and in-app zoom of the canvas
+	update_grid();
+	update_disable_aa();
+});
 
 $("body").on("dragover dragenter", function(e){
 	var dt = e.originalEvent.dataTransfer;
diff --git a/src/functions.js b/src/functions.js
index 21f6988..d3e30b4 100644
--- a/src/functions.js
+++ b/src/functions.js
@@ -15,6 +15,11 @@ function update_grid() {
 		draw_grid_and_tool_previews(helper_layer.canvas.ctx, scale, scale);
 	}
 }
+function update_disable_aa() {
+	var dots_per_canvas_px = window.devicePixelRatio * magnification;
+	var round = Math.floor(dots_per_canvas_px) === dots_per_canvas_px;
+	$canvas.toggleClass("disable-aa", dots_per_canvas_px >= 3 || round);
+}
 
 function set_magnification(scale){
 	magnification = scale;
diff --git a/styles/themes/classic.css b/styles/themes/classic.css
index 991edfe..e4068bc 100644
--- a/styles/themes/classic.css
+++ b/styles/themes/classic.css
@@ -21,12 +21,13 @@
 		image-rendering: crisp-edges;
 		image-rendering: pixelated;
 		image-rendering: -moz-crisp-edges;
-		/* only works on macOS, and not on a standards track: */
-		/* font-smooth: none;
-		-webkit-font-smoothing: none; */
-		/* also may cause the text to be completely unreadable https://github.com/1j01/jspaint/issues/130 */
 	}
 }
+.disable-aa {
+	image-rendering: crisp-edges;
+	image-rendering: pixelated;
+	image-rendering: -moz-crisp-edges;
+}
 
 .selection:after,
 .textbox:after {
diff --git a/styles/themes/modern.css b/styles/themes/modern.css
index 63e92c0..79dfa3d 100644
--- a/styles/themes/modern.css
+++ b/styles/themes/modern.css
@@ -23,6 +23,11 @@ body {
 		image-rendering: -moz-crisp-edges;
 	}
 }
+.disable-aa {
+	image-rendering: crisp-edges;
+	image-rendering: pixelated;
+	image-rendering: -moz-crisp-edges;
+}
 
 .selection:after,
 .textbox:after {