While creating sale orders, each and every time, users need to input the sales area in the initial screen manually.
This can be automated for that particular user so that whenever they execute VA01, the sales area what is set would flow there.
To achieve this, go to SU01 or SU3, select “Parameters” tab and maintain the following parameter IDs:-
VKO Sales Organisation
VTW Distribution Channel
Save this settings. Now go to VA01 so that you can see the sales area flows automatically.
This will be helpful only if users are not creating sale orders with multiple sales area quite frequently.