Do you mean you want all the submenu in the menu of SM to be expandable? If this is your requirement, I am afraid that it's not possible for us to achive. Because in SM menu now, we can not call the function of the submenu to configure them to be expanded by default. In this regards, we cannot change it.
Thank you and Best regards,
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NgocNgo, thanks for answer.
Yes, i want to on ESS web page all menu(submenu, groups and e.t.c.) will be expanded by default.
I saw your topic but i can't resolve my problem with it.