# How to specify a capacitor in Altium schematic as DNP

I am working on a prototype of a project and it involves an antenna. This means that I will probably have to tune this first version a little bit once I get it assembled. To do this, I wanted to place into my circuit a "dummy" capacitor. I realize that I could make a pads in the CAD with the right dimensions, but this wouldn't show up in the schematic. Also, I have seen in schematics capacitors with DNP values. This is what I am essentially looking for. Is there an easy way to do this/best practice? I am a student trying to learn the right way to accomplish these tasks..

• Look in the Altium documentation for the term "variants". – The Photon Aug 5 '14 at 18:54
• Ahh much better googling that. I'll answer this later, thanks – mtleising Aug 5 '14 at 18:57
• For a one-off, I wouldn't usually mess with variants, though. Just put "DNP" in the comment field. – The Photon Aug 5 '14 at 19:05
• Ok, would I have to do anything extra for the manufacturer or do they usually look for and see that stuff? Or does that actually show up in the BOM as DNP? – mtleising Aug 6 '14 at 1:01

The preferred method for this functionality seems to be the component's Type property. Specifically, I think you would use the Standard (No BOM) part type for the capacitor in question. This means the part has electrical information and is synchronized between the schematic document and the PCB document, but it will be ignored by any BOM generation.