{only available when compiled with the |+vartabs| feature} A list of the number of spaces that a 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.