/Applications/Logic Pro X.app/Contents/Frameworks/MAResources.framework/Versions/A/Resources/MAResourcesMapping.plist
This file can be edited in a plain text editor (BBEdit, Text Edit, TextMate etc) or a property list editor such as Apple's Xcode (Property List Editor).
Some of the things possible include:
- Changing the mixer channel strip meters
- Changing the channel strip gain reduction meter
- Changing the arrange or editor backgrounds and division lines
- Changing the selection of available colours for tracks and regions
- Changing the colours of many gui elements
It is possible to share your GUI customisations by just sharing your edited version of this file with others. Replacing this file on your system with a customised one is all that is needed to apply GUI customisations (at least, customisations that involve no changed images).
It should also be possible to edit existing images (eg fader graphics) or possibly add new images to avoid overwriting system images (untested at this time) to apply your own customisations as well.
Note: Back up this file first before making changes!
Specifically, the "Colors" section describes many colours, and is subdivided by type (Eg "Piano Roll"). Here's an example:
Let's look at one option:
Values are between 0 and 255. This is a GrayColor, but there are other options like:
I expect that's RGB+alpha values (alpha = transparency)
So, taking this one property, which is default and looks like the screenshot below:
Let's change it to:
We get this:
Let's use this thread to look at the effect of various colouring options, look at meaning of the parameters and values, and share some nice common customisations, like lightening the piano roll editor, and returning some of LP9's nicer look elements here.