If you’re working with large and complex tables in Inform 7, don’t do it in the IDE. The Inform 7 IDE is wonderful in many ways, but complicated tables get really, really hard to read – especially if you have more columns than screen space.
And if you want to insert a new column, rather than adding it at the end, then things get really messy.
Instead, build your table in a modern spreadsheet. (I’m fond of Calc in the OpenOffice suite, but LibreOffice and Excel are just fine too.) You can add columns, remove columns, sort data, swap around rows – all the good stuff you need.
When you’re ready to go, just copy your data and paste it into Inform, where the column separations will come in as tabs. Which is exactly what Inform 7 wants.
…and their tables.
(so many tables.)