Pixel registration of vector and bitmap drawings
I don't seem to find the answer to this: How do I align vector drawings or bitmaps precisely (pixels for pixels). For instance to build an anatomical image I would like that components that form the final image are exactly placed. How do I do that ?
Another question: How to I align pictures on different layers so they exactly match position (to avoid "shifting" when changing layers). I can select several layers, and get a semi "onion-skinning" but i cannot seem to be able to select pictures on several layer to Align them.