Horizontal scroll possible?

How to allow horizontal scroll on pages? E.g. I want to implement Kanban-style page, with multiple columns (5-6 widgets). Currently, not possible, they will be too narrow. I’d want to have a horizontal scrolling for a such page, but not familiar with Grist codebase to override layout via CSS.

PS: I’d wish Grist to have native Kanban widget. Many systems has it, but that systems are much weaker than Grist.