noob questions about brocade san switch

I don't have any test environment for SAN network that's why I have to learn on production :)

I need to add few aliases and create zone in Brocade 5100. SAN fabric contains mentioned brocade 5100 and brocade 4900. They are connected together with E-Port. 2 x Brocade 4900 are primary - most of ports there are used. Brocade's 5100 is using only E-port and other 3 x F-port which I connected to servers recently.

My biggest doubt is about saving and enabling configuration. Is it that simple just to add aliases, configure zone, save config and enable it? I'm planning to use GUI not the CLI. My worst imagined nightmare is when I enable configuration all of the configuration disappears :)