Welcome to the Fitbit Community, @weiye. I am sorry for the delayed response.
I am glad to assist you with your concern on how to switch calories to steps on your Fitbit app. If you have your device paired to your Fitbit account, I recommend following this link with useful information about removing and rearranging tiles on the Fitbit app.
If this doesn't answer your question, please let me know the additional details and I will be glad to investigate.
I'll be around if you need further help!
Want to discuss ways to increase your activity? Visit Get Moving in the Lifestyle Discussion Forum.
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