I’d like to suggest another layout design which looks like an excel sheet where a task is a row and the columns indicates assignee, details, labels etc… and thus the ability to add custom columns
Hi
Have you tried custom fields ? See How to Create and Use Custom Fields in Asana | Product Guide • Asana Product Guide
Besides, if you want to see an indication of a number next to the task’s line, you can open your profile settings and select “Show task row numbers”, see How to Control Your Profile Settings in Asana | Product guide • Asana Product Guide
Julien