Q: How to allow order modification on MC Seller?

A: On MC Boss → Tap More → Account management → Select a Seller's account → Switch on " Allow order modification"  → Return to save 

Q: Can I modify the orders delivered on MC Seller? 

A: Yes, you can switch off this setting below on MC Boss and Modify button will be shown on MC Seller.

On MC Boss → Tap More → Settings→ Stock cycle → Switch off Display "on your way", out of stock...

*To switch on this function is to prevent orders delivered from modification. 

Now, you can modify orders on MC Seller.