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When I take a rectangle and paste it into Paint 3D, the "vertical" (up the page) axis of rotation is through its centre. How can I move this axis to include, say, the rectangle's left side?

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  • I think we don't have option for pivot point or anchor point change option in Paint 3D. – Vikas Jul 21 at 5:15
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    Thanks, @Vikas. If this is so and you post it as an answer, I will accept it. I have now asked on SoftwareRecs.SE for recommendations of a program that can do this, given that Paint 3D can't. – ruffle Jul 21 at 7:22
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I don't know how to use Paint 3D but since it's available with Windows 10, I tried to see if it's possible to shift pivot/anchor point. But I couldn't find any option in the interface itself.

There's official A Guide to Paint 3D on YouTube by Windows channel. I couldn't find such an option for flexible rotation in those tutorials.

I further saw a few basic tutorials on YouTube about rotation of 2D and 3D shapes in Paint 3D but nothing much was revealed. A few articles about the same I went through didn't mention something like this.

So I feel this feature of shifting the pivot/anchor to some other edge or corner is not possible. Something which we see in a dedicated 3D program like Blender.

You might just want to go for some other workarounds. Something like rotate it the way it is possible. Then change the position of rectangle. Maybe create a temporary shape for a 'guide'. Something like this:

enter image description here

Above example is for 2D. I think you can do similar 'trick' in 3D rotation too, along the edge. Something like this:

enter image description here

Detailed Example:

Let's say this is a front view of a Door like structure. Blue Door to yellow wall.

enter image description here

Now I want it to open this door. So I want it to rotate on left edge as axis. But like your problem, Paint 3D doesn't give you this option. You can only rotate it from center. Just like this:

enter image description here

enter image description here

enter image description here

Now, we have to fix it. So I will use the wall edge as a guide and move door's left side towards it:

enter image description here

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    Thanks for this. I think the method of putting a dot outside the rectangle to change the centre or axis of rotation requires that it be put a long way outside it if the aim is to move the centre or axis all the way to the shape's perimeter. I can't quite follow where the axes of rotation move to in your animations. – ruffle Jul 21 at 11:17
  • @ruffle I quite didn't get your last sentence. Actually the axes of rotation is still in the center, the idea is just to manually move it to that point, so the end result looks like it has been rotated on left edge. Also, I put that blue dot randomly. So I had to move the rectangle a lot more in 2 directions. You can place it on the edge of the rectangle in initial situation. – Vikas Jul 21 at 11:34
  • If you really want to try this or think this can be helpful, I might need to know more what you want to achieve with this. – Vikas Jul 21 at 11:35
  • I would like to be able to cut a 2D rectangle from Powerpoint, paste it into a program, turn it into a 3D object, change one axis of rotation so that it's along an edge of the rectangle, paste back into Powerpoint, and then animate so that I get a "door opening" effect. The step that's causing the difficulty is changing the axis of rotation. Everything else is doable using Paint 3D. – ruffle Jul 21 at 12:09
  • @ruffle you don't want it to rotate it in Paint 3D? You just want to change the axis? Secondly, I don't know PowerPoint much. So I definitely can't comment about how combining PowerPoint and Paint 3D would work. – Vikas Jul 21 at 13:27

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