How do afternoon tea types cut sandwiches?

[PETRONELLAS]

I’m fascinated how the edges are so perfect, bread not squished, filling not oozing. Is it ‘just’ a very sharp knife? If so, what sort of knife?

[Ricekrispie22]

A bread knife, using the sawing action and the serrated edge to cut the bread, rather than much downwards pressure.

[HardAsSnails]

Decent bread knife, no pressing down to cut, wipe between cuts so no filling traces on the outer bread surfaces. I usually cut the crusts off before filling.

[Amber0685]

A very, very sharp chefs knife, don't apply pressure.