Click on the new created Block to see Next Step(s). Click on that to see the more options

Then, fill in the field as following

- Input Key Condition: No Input

- Extension Type: Transfer call

- Transfer Call to: Phone number or Bizphone extension 

+ Phone number: key in the destination number (with Prefix), Enter before key in the next number(s)

+ Bizphone: select the right extension, Enter before key in the new one

- Click Confirm to Save