UiPath Studio

ctrl + k
​ctrl + a
ctrl + x
ctrl + c
​ctrl + v
​

Create a Variable inside expression box. UiPath Studio will try to set the correct data type, based on the context. 
Select everything inside selected expression box. Can use to clear a field before pasting something new into it.
Cut selected portion of workflow
Copy selected portion of workflow
​Paste selected portion of workflow

MS Office

​alt

Reveal shortcut options: