61I want the app to find charts in my PDF

PDF Tools finds the charts in a pattern, and lights up the abbreviations on the page. It is a beta

Before you start
1
Scan a page for charts
The PDF Tools beta card with its two switches, PDF Chart Detector and PDF Glossary Overlay, and its OpenCV tag

With the beta on and a premium plan, the toolbar gains Charts. Open it on a page that has a chart. It looks for charts and tables, then tells you how many rows it found and how sure it is.

A sensitivity slider decides how hard it looks. Lower catches fewer things that are not charts. Higher catches smaller or fainter ones. Move it and scan again. It is quick, and the right setting depends on how the designer drew the chart.

2
Knit from the chart

A chart it has found is drawn on top of the PDF page. Link it to a counter and the row you are on lights up where it really is, on the chart, not in a separate panel. Tap that lit row to move the counter on. The rows behind you shade in as the count goes up.

Colourwork is where this earns its keep. Losing your row there is expensive. See Track Rows and Repeats for linking counters.
3
Light up the abbreviations

The second switch, PDF Glossary Overlay, marks glossary terms on the page itself. In the reader, Show terms turns the highlighting on and Hide terms takes it away again. So you can read the pattern plainly, then light up the abbreviations when a row stops making sense.

The full glossary is on the toolbar as well: Read Your Pattern PDFs.

Available on iPhone, iPad, Android, and web at app.stash2go.com

Pattern PDFs and the Smart Reader · 4 of 11 · Last updated 29 Aug 2026