The "Grid Size" schould be a setting.

I try to do it by changing follow in pencil.js:

Pencil.getGridSize = function () { if (!Config.get("gridSize")) { Config.set("gridSize", "5"); } var gridSize = Config.get("gridSize"); return {w: gridSize , h: gridSize}; };

But it works not very stable!

The Grid Size should be also a point in the "Page Properties" dialog: I changed the "PageDetailDialog.xul" to follow:

    <hbox>
        <label value="Grid Size"/>
        <vbox>
            <hbox>
                <textbox size="3" type="number" min="1" id="gridSize"/>
                <label value="(pixels)"/>
            </hbox>
        </vbox>
    </hbox>

Thanks, Andreas

In 1.2, the grid size setting can be found under General, Grid size or in the pencil.config.edit.gridSize advanced property.