Setting Cores to be used when Rendering Montage

Can this be done? I want to dedicate max cores for rendering to speed the process up. I have set this in the Batch Processor, but cannot find where to set it when rendering a montage.

This is not possible. In the Batch processor, this is one core per task. But rendering a montage is 1 task.

So is there a limitation of only one core per task?

Yes. Using more than 1 core for a serialized process, is a very different story. Not impossible (one core per plugin), but that’s much more complex. This might happen someday, though.