This question already has an answer here:
On closing panel in stackoverflow there is the following form:
Sometimes I find questions, that are more suitable for codereview.stackexchange.com or drupal.stackexchange.com, but I can't vote for migration there, using this panel. So I have to raise a flag: "it needs ♦ moderator attention", and write: "belongs to codereview.stackexchange.com".
Is it possible to allow voting for migration to the other sites of stackexchange network?