Edit Web application context parameters at runtime

Hello Experts,

I've developed a web application on my J2EE.

The web application has some 'context parameters' (see image)

According to the following link:
https://help.sap.com/saphelp_nw73ehp1/helpdata/en/49/78d2d76a5d423ae10000000a421938/content.htm?
frameset=/en/49/78d2d76a5d423ae10000000a421938/frameset.htm₪t_toc=
/en/62/d678c5330a4992bc6fe927e6137c9d/plain.htm&node_id=58&show_children=true#jump58

It's possible to edit parameters at runtime:
"There are two options for configuring Web modules locally:
At runtime, using the SAP NetWeaver Administrator"

I don't want to edit web.xml and deploy the project each time I need to change a parameter...

So how do I change the parameters at runtime? (if I open NWA it's read only)

On version 7.0X it's possible by using Visual Administrator (see image)

J2EE version is 7.31 SP7.

Regards,
Omri