Maximum of load groups
Use Maximum of load groups to calculate the envelope maximum from all load groups that are allowed for this analysis type.

There are no additional settings for this calculation type. The settings of load group calculations are in the Load groups dialogue window.
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To read more about the Load groups, possible settings and options, see the topic:
User interface ➔ Tab menus ➔ Loads ➔ Panel Load case, combination, group & construction stage ➔ Load groups