On 2013-11-23 Jan Tosovsky wrote:

in my two-column index there are several cases when the last entry in the given letter group overflows to the next column/page. In the extreme case it is just the last page reference. ... Additionaly, columns are not balanced properly in all cases. When the first is longer, it is not a big problem. But the opposite case looks weird.

As the registers are rendered programatically, I cannot intervene into this process. But can I influence it e.g. using 'processors' applied to problematic index entries? Processors can be used for setting the font-weight or color of particular entry. Can the same method used for manual setting of 'keep-with-previous/next' ? Thanks, Jan