You can create, store and delete points, lines, polylines and polygons. The vertices can snap onto an orthogonal (90 degree) grid, onto an isometric (60 degree) grid, or not snap at all.
A newly drawn item has large points (vertices) for clarity; you can change the size of these points and you can choose whether these enlarged vertices are stored together with the new figure. You can also change the grid spacing.
The "show stored items" option lets you restrict the display to the first few of the stored items.
The "delete last shown" option lets you then selectively delete any stored item.
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