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Help creating a PCB board part (SVG help)

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I’ve been working for a week on tutorials, messages, etc. to try and learn how the part making process works. I know I have 3 steps and am stuck on the first, creating the breadboard SVG. I created this file in Inkscape and manually edited tags using the Inkscape XML Editor. I created layers for the silkscreen and the connector, and header1 and header2 to try and keep things together. I’m unsure of using groups vs. using layers as it relates to Fritzing, though I’ve used vector based graphics programs for many years.

I manually added a tag for “breadboard” and indented things under it. If I indent the silkscreen and connector layers, they will then disappear because they are then below the breadboard. I am also unclear as to the connector naming. I wanted to start in the upper left of the board (PB0) and number counterclockwise. I started counting with PB0 as pin 0, skipped that header, and numbered the through holes as “connector10pin” through “connector15pin”. I thought I read that connector0 is different than the others which would affect my numbering. I renamed them from connector21pin-1 to connectorXpin. I’m not sure if that is correct. And I don’t understand the relationship of a “pin” to a “terminal” and how to rename them. I started with the through holes at the left that are in a group called “g1411”. Can I rename that “throughholes”?

Also, now I can’t click on any of the groups to select them because they are under “breadboard” and it always selects the board. I can only select them using the layer panel. Maybe that is by design. I know I probably need to group everything at the end anyway, but it would be nice when working to visually click on something instead of having to navigate using a text tree.

Could you please help me? I uploaded the file, but just see the image. I’m not sure how to upload it as a downloadable file.

MCP23017 Waveshare IO Expansion Board2

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