Hi Alex, is what you show there the full stuff you've got? Because what you show there is missing the <moi:PaletteBody> pieces.

I've attached here a SidePane.htm with the palettes separated, you can just copy this over top of your current SidePane.htm to get it set up.

But also if you don't have a tall enough screen for them both to fit when opened, it's normal that they will only show one at a time because when you open up a Palette if it would cause the other currently open UI to extend beyond the bottom of the window, it will collapse other palettes in order to avoid having the UI entirely disappearing off screen and needing a scroll bar to access it. If that's what you are running into you'd need to collapse one of the other open palettes like the draw curve one by doing a second click on its current active tab before you would have enough room for both Construct and Transform to both be open simultaneously.

Hope that explains what you are seeing, let me know if that's not what you are seeing and if you actually have enough screen space for them both to fit on screen at the same time.

- Michael