Editing a list style

I have been looking for a way to adjust the numbered list style format because when I use the “1, 1.1, 1.1.2…” format, the fourth level is indented way too much by default. I experimented with “New Style from Selection” and “Redefine Style from Selection” but was unsuccessful.

Page 613 of the manual references a “Custom List…” menu item, but that does not exist in the Windows version.

So, is there a way to revise list formats or to create my own list format?

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