Before symbols mean anything, the chart has to know which grid cells actually hold a stitch and which are blank background. Erase Mode gives you manual control of that set, so your symbols and counts start from clean data.

Switch into Erase Mode from the tool strip on Set Symbols. Every other tool locks out while you clean up, so you cannot mark or assign by accident. Everything here changes which cells are stitchable, not the symbols themselves.

Controls at a Glance

The Block Brush

Enter / exit Erase Mode

[Screenshot: Erase Mode active, showing the brush swatch and the "Erase Mode" header]

Toggle it from the tool strip. The symbol overlay and highlights hide, the header reads "Erase Mode", and a toast confirms entering and leaving.
Block brush
Tap or drag a rectangular brush across the chart to remove (or restore) populated cells. The definitive way to fix a cell the automatic pass got wrong.
Brush size
Cycle the width and height independently, up to an 11 by 11 block. A white swatch previews the footprint with a "W x H" label, and your last size is remembered.
Erase highlighting
Cells about to be erased are highlighted as you brush, distinct from marked and assigned cells, so you see exactly what will change before you commit.

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Bulk Tools

Clear All Unassigned
In one action, clear every populated-but-unassigned cell across every page. The "I have assigned everything I care about, bin the rest" shortcut. It counts the candidates, asks you to confirm, and the whole sweep is a single undo.
Contrast threshold
In the setup popup's image-scan tab, slide the contrast threshold (shown as a %) to control which cells count as populated, then run the scan across the whole chart. Lower means fewer cells, higher means more. Running the scan replaces existing symbols, and the popup warns you first.
Undo / Redo
Every erase flows through one history: brush strokes, the bulk clear and the contrast re-derive. Any of it can be undone or redone.

Did you know?

  • You can give a colour to blank cells. Use the block brush to fill in empty squares as populated cells, then tap one of them on the chart. All the matching empty cells are picked up together, ready for a colour of your choice.
  • Blank cells you add here count in your statistics once you mark them, just like any printed symbol.
  • Nothing is permanent until you move on. Every stroke and sweep can be undone, so experiment with the cell set freely.

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