QTR-Quadtone RIP

Just want to be clear on the Ink Limit setting:

Is INCREASING the Ink Limit mean you are increasing the LIMIT, thus
causing less ink to be put down (and v-v for reducing the Ink Limit)?

I don't want to create a whole profile for a particular paper but it
seems to be printing quite heavy in the shadows - otherwise the image
is reasonably close to the monitor.

So I'd like to just, (trial and error) reduce the ink and hopefully
unblock the shadow/deep shadow areas. Is Ink Limit the right place to be?

(Latest QTR - OS X Tiger to Epson 1400 with Piezo inks.)

=Alan R.