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The launch of the STABILO BOSS highlighter at the beginning of 1971 marked an innovative masterstroke by Schwan-STABILO with a totally new, revolutionary application. In the days before fluorescent highlighters there were few ways to mark important text.
The idea of simply writing over passages instead of underlining them was obvious: all that was left was for fluorescent ink to be put into a suitable pen. And a revolutionary writing instrument required an equally revolutionary shape – a real challenge for an industrial designer! The designer made one model after another, only to discard them all: square, round, short and fat, long and flat designs.
A conical cylinder he had produced in modelling clay seemed like a promising idea, but it was still hardly anything new.
In his frustration, the designer squashed the model lying in front of him with the flat of his hand… 40 years later, the flat, chubby STABILO BOSS ORIGINAL highlighter still has many imitators. And to this day it remains the highlight of an entire product category.
- Focus on the highlight: Zoom in so the highlighted text fills the capture area
- You don’t need the whole page—only the highlighted section matters
- Keep the page flat: Avoid curved pages near the book spine
- Avoid shadows: They can distort color detection
- Avoid glare: Especially on glossy paper Slight blur is acceptable, as long as the highlight is clear
- Proper exposure is crucial, above all, for accurately capturing highlights and colors.
The app’s detection relies on clear color and text visibility. Poor lighting, shadows, or reflections can lead to incorrect recognition.


