Make Flex to show distance

[SandraVas]

I have been using my fitbit flex device with steps settings so I can view my steps goal on my device. I want to change it to a distance setting which I did by updating my goals. However, the steps goal does not allow a 0 setting and neither does the calories goal. I have set the distance to 5km but how do i know that the display on  my device is reflecting kms and not steps as previously?

Moderator edit: subject for clarity

[MakMak]

Hi, @SandraVas! Under the tracker setting in the app, set your "Main Goal" to distance.

[SandraVas]

Hi. Thanks for your response. There is no "main goal" option. There is only a goal setting which lists steps, calories, distance etc. I have the fitbit flex. Going out of my mind searching everywhere and it is nowhere to be found. 

[MakMak]

 Here's a screenshot of the app with the tracker screen open. Under General, the first option is Main Goal.