Emerging Interfaces

Crossing a Line Can Select Faster Than Clicking a Filter — Except When It Can't

viaCross lets a pen stroke set attribute constraints directly on the canvas, and a controlled study found it beats traditional filter panels on complex selections while losing on simple refinement.

Selecting “everything above $50 and after March” usually means opening a filter panel, finding the right fields, and typing in values. viaCross, presented by Benedict Leung, Mariana Shimabukuro, and Christopher Collins (arXiv:2610.03995), proposes doing it with a pen stroke instead: cross a line through the data you mean, and a widget appears that shows — and lets you edit — the constraint your crossing just implied.

The team ran a controlled study against traditional WIMP filter panels, the standard point-click-type interface this is meant to replace, across tasks of varying complexity. The result isn’t a simple win for the new technique:

  • Complex, object-level selections: viaCross needed fewer strokes and stayed efficient as task difficulty increased. This is its strongest case — constraints that would take several panel interactions collapse into one gesture.
  • Simple attribute selections: The filter panel was faster and more intuitive. For an easy, single-condition filter, reaching for a familiar widget beats learning a gesture vocabulary.
  • Refinement: viaCross matched the panel when creating a selection, but fell behind when refining one — because its widgets have to be recreated rather than adjusted in place.

The authors’ own fix for that last gap is the most useful finding here: persistent widgets, or a hybrid interface that lets a crossing gesture create a constraint and a conventional widget adjust it afterward. That’s a more honest conclusion than most technique papers reach — not “replace the panel,” but “here’s exactly where the gesture earns its keep, and here’s the seam where you should hand off to something else.”