Disabling/deleting the objects (checkpoints) on the map?

I used build plugin to add this checkpoints on the map and i want to know how to take them off from the map.
https://i.imgur.com/ZvClrRm.jpg

 

You can try this in the F1 console in game.
Warning This will remove all of the selected prefab(s) even ones that weren't spawned in manually.

// Crate Marker
del assets/prefabs/tools/map/cratemarker.prefab

// Explosion Marker
del assets/prefabs/tools/map/explosionmarker.prefab

// CH47 Marker
del assets/prefabs/tools/map/ch47marker.prefab

 

And how to create your marker?