Hi Minh,
The “multiple messages” feature works as a “slider”.
For the “horizontal scroll” (ticker) to work, please remove all “<-- message -->” tags after switching to “text editor”.
Once this is done, you should be able to pick “ticker” layout.
I’ll make a fix in the next version of the plugin to automatically set this. For now, please manualyl remove the message tag.
Thanks,
Aakash