Centering everything on middle
We're building a utility billing tool (web app, desktop-first, used by property managers and landlords). On the calculator step, users see a table with tenants, date ranges, and amounts to split costs between them.
My colleague wants the whole content column centered on the page — including the data table — with big empty margins on both sides on wide monitors. His argument: it's better for older, less tech-savvy users because everything stays in the middle of their visual field and feels simpler / less overwhelming.
I disagree. My take:
- Tables are read left-to-right and the eye needs a stable left edge to scan rows. Centering makes every row visually "float."
- On a 1440px+ monitor it looks like a mobile view stretched into the middle of a desktop, with huge empty side panels.
I strongly dislike it but I cannot convince him.. What do you think?