TL;DR: Newbie trying to use "Offset" path effect (not dynamic/linked offset) to add a border around a shape and have both original and border line visible, but only the offset is visible.

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Hi! I'm hoping someone can help me, I'm a complete newbie. I'm trying to create an offset path effect around a sewing pattern piece, which I saw should be possible in the 1.0 release notes. https://wiki.inkscape.org/wiki/index.php/Release_notes/1.0#Offset  (The second gif with the shape and measurements is ABSOLUTELY EXACTLY what I am trying to do.)

I specifically want to use the path effect offset, because I want to define the offset to be exactly .25 inches away, no matter how I resize the piece afterwards, and I want to be able to reshape the original path and offset together, and move them together. Dynamic offset and linked offset do not have an easy way for me to do this. (No way to easily select the exact distance; the paths move separately; resizing the original shape makes the offset larger than .25 inches until manually adjusted back down.)

When I create a path effect offset, the original line I drew vanishes, although the nodes on the line remain so I can change the shape. I'm not sure how to keep the original line visible. The official release notes gif shows a path effect of "clone original" which might be the reason mine is not working, but when I add a "clone original" path effect, the original line is still invisible and I am not sure what settings I should be picking there, so I'm not sure what I'm doing wrong!

Image of the issue: https://imgur.com/a/NcAXN5w

Video of me trying to replicate the gif: https://www.youtube.com/watch?v=bMQxrhT_9ZE

I'm assuming they've duplicated the path in the original gif (with Ctrl + D) before they start the offset procedure. You keep one path as your original, then you offset the duplicate. I'm not sure if I'm missing something, but I've always made a duplicate before I do any kind of offset operation.