Go to Administration → Plugins → Checklists plugin configuration.
Here you can activate the issue done ratio for your checklists.
Checklists templates tab
Here you can view all templates and modify them. Please note columns visible to any users – meaning the checklist is private or not, and project – decide if the checklist can be used in all projects or not. A checklist template can be also created from project settings – then it will be used in that project only by default (it can be changed to a global checklist).
This tab allows you to create a checklist for certain categories, e.g. Design. You can view and modify existing categories, as well as add new ones.