Tentukan persentase panel dalam proyek tmuxinator

Bagaimana cara menentukan persentase panel di tmuxinator? Misalnya: project_name: ad_dev project_root: ~/Programming/WWW/Rails/projects/ApparelDreamDev rvm: ruby-1.9.2-p290@apparel_dev pre: SQL tabs: - editor: layout: main-vertical panes: - vim 75% - #empty, will just run plain...