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).
Comments
any darktable expert here knows how to compare two photos side by side in darktable
Also, can we use magnifying glass, instead of zooming in and scrolling the photo
ideally, would be select two photos to compare, click on compare side by side, and the two photos viewed on screen
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).
FWIW Digikam has a light-table feature for this.
https://userbase.kde.org/Digikam/LightTable
Sorry if that's not helpful to you, it might be useful to others though.