Few things that could make this easier:
- Add machine readable page numbering to the notebook
- Some kind of annotation scheme, like (1) I could use to refer to the drawings on the notebook.
On laptop I could refer to the pictures with <page number>:<picture> style notation.
Would be actually nice to follow similar workflow with laptop and iPad. Write text on full keyboard, draw diagrams for the same note on iPad at the same time. Maybe this is already possible, have never tried this.