How to draw a single pad in Altium DXP 2004 schematic? I mean to put a symbol in the DXP schematic then it transfer to a pad in the pcb automatically when updated.
You would have to make a symbol with at least one pin in the Schematic Library, and a corresponding single pad as a footprint in the PCB Library. You would then enter the pad footprint in the schematic symbol as the footprint model. Now when you use your symbol in the schematic, DXP will use the PAD as the footprint on the PCB.
In other words, you treat the pad like any other component.