code: def test_layout():
      """Memorize a page location, re-layout with ISO-A4, assert pre-determined location."""
      loc = doc.make_bookmark((5, 11))
      doc.layout(fitz.Rect(fitz.paper_rect("a4")))
      assert doc.find_bookmark(loc) == (5, 6)
  
imports: import os
  import fitz
label_desc: Use image node_id 3 for calling a global function with example usage: test_layout() without return types