OPTION

let g:marker_reader_scroll_ratio = "0.7"

mnext, mprev scroll 0.7 * <screen height>.

let g:marker_reader_onload = 0

prevent PageLoad insert markers action.

javascript <<EOM
liberator.globalVariables.marker_reader_ignore = [
    /^https?:\/\/mail\.google\.com\//,
    /^http:\/\/(?:reader\.livedoor|fastladder)\.com\/(?:reader|public)\//,
];
EOM

prevent PageLoad insert markers action on these pages;

let g:marker_reader_mapping = "J,K"

adds mapping J = mnext, K = mprev.