Culling mode, new in v3.0, allows comparing two (or more) photos side-by-side. The new version also allows for zooming in on images in lighttable mode (control-

Culling mode, new in v3.0, allows comparing two (or more) photos side-by-side. The new version also allows for zooming in on images in lighttable mode (control-shift-scroll) when in culling mode or when images are "previewed" (full screen via the "w" key).