Hi Lens42, Welcome to EasyEDA. Good question. :) You have two options: 1) Draw the schematic including all the off-board components but assign the off-board parts PCB footprints for suitable headers or connectors. So a pot may have a 3 pin header, a DPDT switch may have a 6 pin header and a battery or a speaker may have a 2 pin connector. This is how the switches are done in the Tesseract project: https://easyeda.com/example/Tesseract_Guitar_Practice_Amp-MjP71jBni 2) If a component is off-board then don't draw it on the schematic. If you need to show how external pots etc., are connected in a schematic then create a separate assembly drawing. You could just copy the schematic and add the pots but then if you change the schematic for the PCB, you have to change the one on the assembly drawing too so it's better to just represent the schematic as a block with only the relevant off board connections shown. Then in the schematic, for example for a pot, place a 3 pin header in the schematic as points to wire the pots to and label the nets to indicate what each net connects to. When you pass the schematic into PCB, that then creates 3 pads on the PCB. You can wire directly to them or via a 3 pin header/connector of some sort. The battery connection in the Tesseract schematic is done that way.

Choice one sounds good to me, but when I try to change the potentiometer package to a three pin header, I get this error when I try to update the PCB. "PACKAGE ERROR Pre RV2 RV1 RV3 Please check these components' package in your schematic carefully" I'm don't know what I'm supposed to look for. The schematic seems fine to me.

One extra step required. For each symbol to which you assign a different footprint from the library (i.e. not the one that the symbol pulls in when you first place it), you need to right-click on it and then select: `Add Favorite` (or click on the `More` button and then select `Add Favorite`) ![enter image description here][1] This puts the part into your local library so when you pass the schematic to PCB it can be picked up. [1]: /editor/20170128/588b97664336d.png