How to obtain axial slices of multiple volumes and display them in the same randerer as MultiVolume？

Development
2

Use vtkImageActor::SetDisplayExtent to display a slice of the image data.

For example: (From https://examples.vtk.org/site/Cxx/ImageProcessing/EnhanceEdges/)

originalActor->SetDisplayExtent(
      reader->GetDataExtent()[0], reader->GetDataExtent()[1],
      reader->GetDataExtent()[2], reader->GetDataExtent()[3], middleSlice,
      middleSlice);