So for someone like myself who has just bought a new Nikon and wants to get an idea of the effect of the different picture controls it isn't possible to do this if I have shot RAW as well?
Do the picture controls have an effect on the embedded jpeg? I want to try to streamline my workflow. Would like the ease of shooting jpeg sometimes where I am not after utmost quality and will have taken a lot of shots.
The other thing which I'd like to be able to do is a master adjustment of different combinations of saved presets in each of the panels. Obviously 'lift' enables this, but suppose the equivalent of LR develop settings is what I'm after.
Embedded JPEGs do nothing. You can't use them with Aperture (or with Lightroom). The one exception is Aperture's "quick preview" which will use the embedded JPEG for display when you're in that mode, if you didn't let it generate its own preview.
Frankly, with Aperture, forget about JPEGs. Shoot RAW and not RAW+JPEG. Given you can generate JPEGs from the RAWs in about one second per picture, it's just not worth the space for the JPEG.