Setting shared_buffers No Effect

Trying to set shared_buffers to 256MB but seems not to take effect. I have in postgresql.conf:

shared_buffers = 256MB

Have restarted the service. Yet when using "SHOW shared_buffers" it returns 4MB. Query being run in pgAdmin4.

Configuration file is the correct one according to "SHOW config_file;"

Sure I am missing something something simple, any ideas?

Thanks,

Lorne