Do you mean pinging a spot on the map? If so, here's what you're looking for:
Trigger:
Ping
Events
Conditions
Actions
Cinematic - Ping minimap for (All players) at (Center of (Playable map area)) for 1.00 seconds, using a Simple ping of color (100.00%, 100.00%, 100.00%)
-------- Either of these --------
Cinematic - Ping minimap for (All players) at (Center of (Playable map area)) for 1.00 seconds