How to force to show all placemarks even when overlapp each other

[?? WANG Cui]

Hi,
Placemarks all show on globe when separate from each other without overlapping. 
However, when zoom out globe, placemarks get overlap and only 1 placemark 
shows, other placemarks hide.
Is there a way to force all placemarks show even when overlap each other?
Thanks,
WANG Cui