Customizing View Schemes
Better than an empty page, the two links below lead to articles posted on the J River help forums. Although the first was written when v13 was current, much of it is still valid today and offers a good entry point. At the time of writing, v18 is the current major version, and so far, all of the v17 article is still valid. There have been no changes to the customising of view schemes from v17 to v18.
If you have any questions, post them in the v17 thread where you should receive an answer quite quickly.
Note that the links above will not open in new windows, so if you would like to keep this page open, right click the links and choose the new tab/window option.