It depends on your Project code. Are you using design time Markers or run time Markers? If the coordinates of the Markers are pre-coded, you should see them immediately; if the coordinates come from a file, perhaps a csv; you have to provide code to load the file in your Screen1.Initialize event handler Block.
It depends on your Project code. Are you using design time Markers or run time Markers? If the coordinates of the Markers are pre-coded, you should see them immediately; if the coordinates come from a file, perhaps a csv; you have to provide code to load the file in your Screen1.Initialize event handler Block.