Set the drawing art layers to Bitmap for all selected read nodes.

setArtLayersToBitmap.js

/**
 * Set the drawing art layers to Bitmap for all selected read nodes.
 */
scene.beginUndoRedoAccum("Set Layers to Bitmap");
var readNodes = selection.selectedNodes().filter(function(selNode) {
		return node.type(selNode) === "READ";
	}
)

readNodes.forEach(function(n) {
	node.setTextAttr(n, "overlayArtDrawingMode", 1, "Bitmap");
	node.setTextAttr(n, "lineArtDrawingMode", 1, "Bitmap");
	node.setTextAttr(n, "colorArtDrawingMode", 1, "Bitmap");
	node.setTextAttr(n, "underlayArtDrawingMode", 1, "Bitmap");
});

MessageBox.information("All operations complete.");
scene.endUndoRedoAccum();