A list of the number of spaces that a <Tab> in the file counts for, separated by commas. Each value corresponds to one tab, with the final value applying to all subsequent tabs. For example:

:set vartabstop=4,20,10,8

This will make the first tab 4 spaces wide, the second 20 spaces, the third 10 spaces, and all following tabs 8 spaces.

Note that the value of 'tabstop' will be ignored while 'vartabstop' is set.

(default "")

only available when compiled with the +vartabs feature