Board Thread:Support Requests - Designing Your Wikia/@comment-1820055-20150322050306/@comment-126761-20150323220716

This is not currently allowed, sorry - but it is a concern we recognise.

However, I should mention that we discourage using wide tables. As mentioned elsewhere, a very large proportion of visitors are on mobile devices these days, and wide tables will invariably have issues displaying on them. It's a good idea to see if tables can be redesigned to fit smaller widths, perhaps by using two rows of data for each item (potentially halving the number of columns).