This is the practical guide to using the Set Symbols screen, whether you are building a symbol setup from nothing or correcting results that Markup has already found. If you are not yet sure what work your chart needs, start with Set Symbols.

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

The Toolbar at a Glance

Display and Setup Controls

Set Symbols toolbar with setup, scan, page information, chart view and fit-to-screen controls

From left to right:

  1. Configure Symbol Setup: choose symbol-entry settings or rebuild the symbols from PDF data or page images. Full guide.
  2. Scan All Pages: run the saved symbol searches across every chart page. Markup warns before replacing manual symbol edits.
  3. Page information: show or hide the page headings, symbol totals and page-level information drawn over the chart.
  4. Chart or page view: switch between the joined chart layout and individual PDF pages.
  5. Fit to screen: reset the zoom so the current chart view fits the available workspace.

Finding Symbols

Detection Controls

Configure Symbol Setup
Use the Build button to open the setup switches and choose how symbols are found: from data embedded in the PDF or by scanning the page images. Full guide.
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 grid square
Builds a new symbol from that grid square, with a live search for look-alikes. Full guide.
Tap an assigned grid square or a panel row
Opens that symbol for editing: its grid squares, sensitivity and icon. Full guide.
Erase View
Controls which grid squares count as stitchable. Full guide.
Merge Symbols
Combines duplicates and returns you to Set Symbols afterwards. Full guide.
Undo / Redo
One history covers every grid-square edit and erase across the step.

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Reading the Screen

Match highlighting
Matched grid squares are highlighted on the chart: green for the current symbol, grey for unassigned grid squares.
Symbol panel
Shows every symbol with its colour, icon and counts. Resize it Thin / List / Full / Hidden, and sort or scope it to the current page.
Chart opacity slider
On colour charts, fade the symbol overlay to see the chart beneath.
Page headers and flags
Each page shows its number and symbol counts, and flags any outstanding grid problem.

Did you know?

  • Returning later never silently re-scans. Your manual edits stay safe unless you deliberately refresh or scan again.
  • You cannot leave mid-scan. Tap the full-screen overlay to cancel cleanly.
  • Delete Symbols is protected by clear choices and warnings. Remove one selected symbol or every confirmed symbol. Deletion cannot be undone, but the chart grid remains in place. Full guide. If you need to rebuild the list afterwards, see Rescan Symbols.
  • Replaced a page? Its symbols are re-detected when you return, while existing manual edits are kept.

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