Performance settings

Open the Options tab and choose a Performance preset. Changes apply immediately; there is no need to regenerate the map.

Setting	Quality	Balance (default)	Speed
Shape rendering	Geometric precision	Optimize speed	Optimize speed
State halos	Shown	Hidden	Hidden
Redraw on zoom	While zooming	While zooming	After zoom

Choose Speed if moving around a large map feels slow. Quality keeps the blurred glow along state borders. Balance hides that glow while continuing to redraw visible labels, icons and relief during movement.

Adjust individual settings

Click the cog beside the preset to open Performance Settings:

• Shape rendering is a hint to the browser about drawing edges. Choices are Geometric precision, Auto, Optimize speed and Crisp edges. Its effect depends on the browser; Optimize speed does not guarantee a speed improvement. Crisp edges can remove edge smoothing.
• State halos shows or hides the blurred glow along state borders. Hiding it reduces the cost of drawing the map.
• Redraw on zoom controls when labels, icons and relief update during zooming or panning. After zoom redraws once the gesture ends, so newly visible content can appear all at once.

The preset reads Custom when the settings do not match one of the three presets. The reset arrow beside a setting restores that setting to its Balance value. Selecting Balance in the Options tab restores all three together.

These are application preferences, remembered between sessions. They affect presentation, not the generated geography or population. The Performance controls replace the older separate Rendering and Redraw on zoom options.

For other ways to reduce drawing work, see the performance FAQ.