Unfortunately, Finesse does not provide Task Buttons as you have in CAD out of the box
http://www.cisco.com/c/en/us/products/collateral/customer-collaboration/finesse/white-paper-c11-736448.html
In order to achieve this, you will need to create your own Custom Gadgets and that way you should be able to do that. There is a company called 2Ring which can help you with these gadgets:
https://www.2ring.com/GADGETS
Regards
Deepak