Map with marker managing by group list cuestion

Hello.
Sorry for my English.
Thanks for your great work.
a question.
Can the option map with markers for control group. that at first appear all markers?
Thanks, do not know if I have understood

hi. if I understand, you want to see placemarks at first time when map is shown. if yes - go to placemark group property and set active in group list

thank you very much
Already seen.
I will continue to know the component
greetings
Alberto