 Attach to path
It is much easier to draw a circle with the ellips marquee tool (use shift as you know to draw a circle, and alt to start from the centre), and draw a second one that will automatically add (the cursor gets a + sign. you can also use the other options from the toolbar), and a third etc, and then stroke at the end.
Should your shape on ten layer be difficult to reproduce and you really need it badly, then just say so, and we'll come up with a solution. But it will be more complicated.
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Linear Mode
