In real-time, we dont use nested actions. Instead, based on 
keywords, we call Specific Single Action. In general, 
nested actions have many drawbacks like "Debug is 
problematic".
I have no knowledge about usablility of nested actions.


Patil
Support BJP
Support Rashtreeya Swayam Sevak Sangh.

Nesting Actions


Running an Action within an action is nesting. The 
following are the uses of nesting actions.


• Helps maintaining the modularity of the test
• Help running one action or another based on the results 
of a conditional statement
• To insert a nested action, follow the same procedure for 
inserting a new Action, with, select after the current step 
as 6th step.

To reuse the parameters of one action in another action we 
should Nest the secound action to the first.

The advantage of using Nested Action is that ,when we use 
the parameters of one action in another action there is no 
need to make the secound action into Reusable action.