The richest step of setup. The app finds your chart's symbols and assigns each one to its cells. From here you tune how strictly it matches, add symbols it missed, edit the ones it found, erase stray cells and merge duplicates. Every change can be undone.

The title bar shows your progress as "Set Symbols: N% (a of b)", counting the cells assigned so far. The deeper tools each have their own page: adding a symbol, editing a symbol, symbol search and Erase Mode.

Controls at a Glance

Finding Symbols

PDF data or image scan

[Screenshot: the detection setup popup showing the PDF-data quality badge and the image-scan tab]

Choose how symbols are found: from data embedded in the PDF, or by scanning the page image. A quality badge (None / Low / Medium / High) rates the PDF data, and a green tick marks the active source.
Scan All Pages
Re-detect every symbol across every page in one run. It replaces manual edits, so it warns you first. Tap the busy overlay to cancel a running scan.
Refresh current page
Re-detect symbols on just the current page using the saved settings. Multi-page charts only; it confirms first.
Colour chart detection
The app senses whether the chart is coloured and picks its strategy: icon-first for black-and-white, colour-first for coloured. A toggle lets you override it.

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Fixing Symbols by Hand

Tap an unassigned cell
Builds a new symbol from that cell, with a live search for look-alikes. Full guide.
Tap an assigned cell or a panel row
Opens that symbol for editing: its cells, sensitivity and icon. Full guide.
Erase Mode
A dedicated clean-up mode that controls which grid cells count as stitchable. Full guide.
Merge Symbols
Jump to the merge tool to combine duplicates, and return here afterwards. Full guide.
Undo / Redo
One history covers every cell edit and erase across the step. Experiment freely; nothing is a dead end.

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Reading the Screen

Match highlighting
Matched cells are highlighted on the chart: green for the current symbol, grey for unassigned cells.
Symbol panel
The right-hand list shows every symbol with its colour, icon and counts. Resize it Thin / List / Full / Hidden, and sort or scope it to the current page. Delete All sits in its header.
Chart opacity slider
On colour charts, fade the symbol overlay to see the chart beneath. It resets to full when you leave.
Page headers and flags
Each page carries a header with its number and symbol counts, and still flags any page with an outstanding grid problem.

Did you know?

  • First arrival auto-detects. Returning later never silently re-scans, so your manual edits stay safe.
  • You cannot leave mid-scan. While a scan runs, a full-screen cancel is the only way out. This protects your symbols from half-finished detection.
  • Delete All is a fresh start, not a disaster. It confirms first, it is undoable, and your grid is untouched.
  • Replaced a page? Its symbols are re-detected automatically when you return, and your manual edits are kept.

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