Define group event - min or max participants and resources
Configure settings that allow you to define the min or max participants and resources
Display of fields on a Group Event is controlled by the custom setting Group Event Custom Fields.
Fig: Group event custom fields settings in Salesforce
The Field Label text can be changed, but the Field Name cannot be changed. For example, in the image following Field Label is highlighted and showing as ‘Minimum Participants’ for the field Maximum_Number_of_Participants__c. Note: A suitable update for this label could be ‘Max. Participants’, to keep field labels short.
Fig: Edit group event custom field screen in Salesforce