Only steps that are available the issue will be visible. Availability is determined by the project and issue types that are configured on the sign off step.
Each sign off step shows its current status. To begin with, this will read Not Set. If a sign off step has been marked with a particular status, the text to the right will indicate how long since that status was applied, and the user who applied the status. For a full history of all statuses for all sign off steps, click the History tab.
Sign Off a Step
Click the status to reveal a drop down of available statuses for the sign off step. You may select Done to sign off a step. You may have additional statuses to pick from if they have been enabled in sign off settings.