Syncing Renoise To External Sequencer

Hmmz…
http://www.renoise.com/indepth/tutorials/u…sed-to-renoise/
This demonstrates Renoise in Master mode.

I posted the Renoise Slave option in this post: https://forum.renoise.com/t/syncing-renoise-to-reaper-or-other-sequencers/20784

If you want the control vice versa to the video, you mean that you want Renoise as a slave.
Either way, both links above show both modes, so what you want should be among them.