Can't add status in scrum board

[Kelvin Soen]

Add status button not available, only add column

[Nic Brough -Adaptavist-]

Add status is only available to boards using "simplified workflow" up until Jira 7.6 (in 7.6+ project admins can make changes to workflow via project admin, if the Jira admins have allowed it).  You need to get your administrators to convert the board to use simplified workflows if you want to change the status list via the scrum board.