[GeoffR]

If anyone tests the `My 24 line spacing values` patch and has problems, maybe one thing to try would be to edit the patch as follows to reduce the number of values to 15:

Spoiler:

# Replacement value: the number of initial line spacing values to exclude from
# the line spacing slider; minimum 0, maximum 13. E.g. 9 will result in a
# slider with 15 positions, starting from the 10th replace_float value below.
replace_int = 65A036, 0, 9