diagonal hr's
https://codepen.io/delonnkoh/pen/KWbqLx
https://codepen.io/KyleDavidE/pen/NWqwGG
https://stackoverflow.com/questions/22352311/how-do-i-draw-a-diagonal-div

vertical hr
https://codepen.io/gucunski/pen/npRoXW

wavy hr's
https://codepen.io/joeyhoer/pen/AgbXOj
https://erikmartinjordan.com/style-hr-line-wavy

hr's with text embedded
https://stackoverflow.com/questions/18522381/create-a-horizontal-rule-with-text-in-the-middle
https://stackoverflow.com/questions/5214127/css-technique-for-a-horizontal-line-with-words-in-the-middle

pop-up tooltips
https://www.w3schools.com/howto/howto_css_tooltip.asp
https://www.w3schools.com/css/css_tooltip.asp
https://blog.hubspot.com/website/html-tooltip
https://blog.logrocket.com/creating-beautiful-tooltips-with-only-css/


html-ized paper outlines
https://codepen.io/AlHakem/pen/BxXrKe
https://codepen.io/derekbtw/pen/LQEOLN

print warnings based on browser version, for displaying vert text
https://stackoverflow.com/questions/2400935/browser-detection-in-javascript#14862119

embedding base64 images in html
https://www.w3docs.com/snippets/html/how-to-display-base64-images-in-html.html
https://css-tricks.com/data-uris/

table sorting
https://www.w3schools.com/howto/howto_js_sort_table.asp


quotes or umlauts underneath (for J. J. signature)
https://en.wikipedia.org/wiki/Two_dots_(diacritic)
https://en.wikipedia.org/wiki/Macron_below
maybe others at https://en.wikipedia.org/wiki/Diacritic


after transcriptions:
https://www.sgq.qc.ca/index-des-actes-notaries-transcrits