You can easily convert USDT (Omni) and USDT (ERC-20) or vice versa right from your Account page.
Follow this steps to complete your first exchange:
1. Go to your Account page.
2. Hover your cursor on the USDT or USDT20
3. You will see "Transfer to USDT"/"Transfer to Transfer to USDT20" line. Click it to start a conversion.
4. Enter the amount you wish to convert and hit Transfer.
That's it. You've converted USDT!