【method one】
1. With "scissors select tool" drawing boundaries。
2. "Select" - "reduce"，5px (Depending on the circumstances adjustment)。
3. "Select" - "feathering"，5px (Depending on the circumstances adjustment)。
【Method Two】
1. Click "scissors select tool"。
2. Check the "feathered edge"。
3. Drawing object border。
[Reference]
