Select DASH as the cryptocurrency you want to swap in "You send" cryptocurrency list. Select BTC as the cryptocurrency you want to receive as the swap result in "You get" list.
Enter the exact amount you of DASH are willing to swap into "You send" box. Check the estimated payout amount of BTC in "You get" box.
Enter the payout BTC wallet address into "Receive to ... address" box. You can also provide a refund DASH wallet address at this step if you want to get your Dash back automatically in case of a transaction failure.
If all provided values are valid and correct, the background of "Swap" button will turn green. Click the button to create the DASH to BTC swap transaction. You will be redirected to the swap transaction page.
On the DASH to BTC swap transaction page, you will see a deposit DASH address. Send the exact amount of Dash shown on the page to the deposit address.
The rest of the DASH to BTC swap process is automated, all you have to do is wait a bit for the process to complete. You can track the status of your DASH to BTC swap on the transaction page. Typically, most swaps take from 5 to 60 minutes. In some cases, when at least one of involved crypto networks is congested, the transaction could take longer than that.
When the swap status is "Finished", you can see a new inbound BTC transaction in your receiving Bitcoin wallet.