Chapter 8: Row-Column Scanning
Row-Column Scanning is the most common grouped scanning method.
How it works
Stage 1: Scan rows → select a row
Stage 2: Scan items in the row → select item
Why it’s effective
Row-column scanning reduces scan cost for medium-to-large grids. A 6×6 grid takes at most 12 presses, not 36.
When to Use It
- Medium to large grids (16–64 items)
- Layouts with clear row structure
- Users who can handle two-step selection
Related Variants
- Column-Row scanning
- Mixed group + row/column scans
- Progressive segmenting (split into halves/quarters)
Tip: For dense grids, try point technique to reduce visual clutter. For beginners, start with block technique.
Demo
🎮 Watch rows scan first, then items in the selected row.