I don't understand what you mean by "part items". Parts are sections of a component - like U1A, U1B, etc. The A, B, etc, are parts of U1 - is that what you mean. Are you talking about selecting on the schematic or the PCB?
I don't know what your overall goal is, but there are a number of ways to select only "parts".
- You can use the Schematic Filter panel with the query (ObjectKind = 'Part')
- You can use 'Find Similar Objects' from the right click menu
- You can set the 'Sch List Panel' to show only parts and select them in that Panel
- You can set 'Preferences>Schematic>Graphical Editing>Shift Click to Select>Primitives>Parts' so shift clicking to select will ONLY select Parts
Without knowing what you're trying to accomplish, it's difficult to know what to recommend.
Am just trying to create rules for a design: creating classes etc. Only way I can find to do this is through Design-> Classes in the PCB file but when I try to update the schematic file I get a message "Differences cannot be resolved by ECO"
Is there anyway to resolve this? Alternatively can I create the rules in the actual schematic and update the rules that way?
am trying to use a polygon to pour over a net. How do I configure the thickness of the connections between the polygon and solder pads on components? At the moment there are only 4 very thin connections between the polygon and the pad.