superimposing

/S UW0 P ER0 AH0 M P OW1 Z IH0 NG/
verb
  1. 1

    To place an object over another object, usually in such a way that both will be visible.

    โ€œHe superimposed the company logo over the image.โ€

  2. 2

    To establish a structural system over, independently of underlying structures.

noun
  1. 1

    The process, or the result of superimposing

  2. 2

    The placing of one image on top of another, especially placing a photograph over some other graphic

  3. 3

    The building of ontological categories of a higher level on top of categories of a lower level.

Source: https://en.wiktionary.org/wiki/superimpose, https://en.wiktionary.org/wiki/superimposing, https://en.wiktionary.org/wiki/superimposition