Looking to close the Compose email by default and show the email box completely in workspace

[sai krishna10]

Hi Team,

We have created the custom workspace but when we are clicking on the compose email, it is showing the below screenshot, but I am looking to close the right side bar panel by default and show the email completely. Any idea where I have to update for this.

Current one

Expecting 

[Ankur Bawiskar]

@sai krishna10 

I doubt this is feasible.

If my response helped please mark it correct and close the thread so that it benefits future readers.