I came here to request the same. Is this being worked on at all? If you use the email tool a lot, not being able do adjust the column size forces you to constantly make copies just so you can read the title of the email. Thank you

Agreed. I'm not sure why this wasn't included in the first place.

Agreed. Columns are poorly designed as all equal widths. Cannot read event names if they are the slightest bit similar since only a small portion shows. This seems to be an oversight on the site designers part since adjustable columns are a very common feature.