I do one string off, one string on.
Detune.
Take string off without snipping.
Colour in nut slot (pencil).
Install new string.
Make sure the wraps are neat and low on the capstan.
Make sure string is properly seated in nut and bridge saddle.
Tune to pitch.
Stretch string.
Set witness points.
Tune again.
Repeat for the other strings before checking intonation across all four strings.
Witness points are a 30 second task but so many players don't do it:
https://hazeguitars.com/blog/string-seating-and-witness-points#:~:text=The 'witness point' advice is,when you remove the string).