Each axis now takes its own tick marks, and the value axes a prefix and
suffix for their numbers:
https://helpx.adobe.com/illustrator/desktop/automate-visualize-data/visualize-data/change-graph-value-axes.html
- Value axes (the left one, or a bar graph's bottom one, and the right
one): tick marks of no, short or full length, and a count per
division; labels stay at the divisions.
- Category axis: the same, at the labels or, with Draw Tick Marks
Between Labels, between them (halfway between labels when they sit
at the plot's edges).
- Add Labels: prefix and suffix per value axis ($, %).
- The Graph Type dialog offers the lengths and value axis sides as
choices, and counts it sends back as floats are read.
Own choices, as the page doesn't say: the lengths are none, short (the
4 pt ticks as before) and full (across the plot); category axes start
with no tick marks, as they had none before. Counts are capped at 20
per division and 10,000 category tick marks, affixes at one line of 64
characters. A full-length tick on the zero line or an axis line is left
out.
The legend moves past a bar graph's last value label when a suffix
runs it into the legend's gap. New fields are written only when set;
graphs with the default options draw the same art as before.