frozen - when true on an async paper, the paper is frozen. This means that changes made in this paper's graph are not reflected by the paper until this state is reversed. Use paper.unfreeze() to unfreeze the paper, and paper.freeze() to freeze it again. (You may also use paper.updateViews() to manually refresh the paper and leave it frozen.)

Example:

var graph = new joint.dia.Graph();
graph.resetCells([cell1, cell2]);
var paper = new joint.dia.Paper({
	el: document.getElementById('paper-holder'),
	model: graph,
	frozen: true
});
paper.unfreeze();