How to instantiate an object by dragging it? Something like select an object and place it into scene.

What I really want is to select an object from a list and then place it by drag, with rotation but thats secondary. PLS HELP AN UNITY BEGGINER. thanks.,What I really want is to press a button that allows me to drag an object on the scene, with rotation but thats secondary.

PLS HELP A UNITY BEGGINER. thanks.

Drag an object into Project folder to create a prefab, then you can drag that prefab in to scene to place as many as you want.

Prefab tutorial