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Why are the legs not listed as part 2?

Hello,
I want to construct a small table with 2 tops, I first created the top plate (part 1), then a leg as New, so part 2, but in the list of parts there is only part 1.
I have mirrored the leg once and want to mirror the 2 legs again, but I can't select them. Why?
I know it's probably not the best way of construction, without Assembly, but it should still work.
Kind regards
ProApe
https://cad.onshape.com/documents/82a6fb94289d94f9ada4486a/w/865cc4617663278b23ff0d3b/e/2ccde6e97d707fa12b36c8e2?renderMode=0&uiState=68659d3ee4c0e65991149472
Comments
The mirror feature is set to "add" so it merges the legs with the table top.
Set it to "new" and will leave the legs as separate parts
Hello,
Thank you!
That is so logical!
I hadn't seen that, as with the extrude function, you can/must also choose between New and Add for the mirror function.
Kind regards
ProApe