public String getDefaultLayerName() {
		String prefix = "Layer ";
		int highestLayerNb = 0;
		for (CPLayer l : layers) {
			if (l.name.matches("^" + prefix + "[0-9]+$")) {
				highestLayerNb = Math.max(highestLayerNb, Integer.parseInt(l.name.substring(prefix.length())));
			}
		}
		return prefix + (highestLayerNb + 1);
	}