Tileset mode lays every layer out as a grid of tiles on one canvas, so you can see and edit a whole tileset in context—each tile remains its own layer underneath.
Switch the inspector’s layer mode to Tileset. Importing a sprite sheet named …-table-<w>-<h>.png sets the grid up for you.
To turn an existing canvas into a tileset, choose Canvas > Split into Tiles, enter the tile size, and Dottie cuts the artwork into one tile per cell and switches to tileset mode.
To go the other way, choose Canvas > Merge Tiles into Canvas. Dottie lays every tile back into its grid position, flattens the sheet into a single layer, and leaves tileset mode. When it was Split into Tiles that made the sheet, the result is cropped back to the original canvas size—so a split and a merge round-trip cleanly. Only visible tiles are kept—a hidden tile leaves its cell transparent.
Clicking a different tile makes it active and paints it in the same gesture. Command-click a tile to make it active without painting. Drawing routes to whichever tile is under your cursor—strokes, fills, and shapes can cross tile boundaries and land on the right layers.
Tiles are separated by thin see-through gaps—the same look as the document tile grid. Hold Command to show a badge in the corner of the canvas with the active tile's number, grid position, and name.
To rearrange the sheet, keep Command held after clicking a tile and drag it to another cell: the target cell highlights, and dropping moves the tile there (press Escape to cancel). Command-right-click a tile for quick actions—Select, Duplicate, Clear, Shift, or Delete—without leaving the canvas. A plain right-click still paints with the secondary colour.
Move the pointer to the right edge of the sheet: a resize rail brightens as you approach it. Drag it left or right to change how many tiles sit in each row—the grid reflows and snaps to whole columns when you release, with a count shown as you drag. The bottom edge has a matching rail that works in rows instead; where the two meet, the right rail wins.
You can also choose Canvas > Tileset Columns to pick an exact number, or Automatic for a near-square layout.
Choose Canvas > Shift Tile > Left/Right/Up/Down Control+Option+arrows to scroll a tile’s pixels with wrap-around. Pixels pushed off one edge reappear on the opposite edge, so you can paint over the seam and check that the texture tiles cleanly.
With Shift held, View > Zoom to Fit becomes Zoom to Tile Shift+Command+0, filling the window with the current tile.
Turn on Canvas > Wrap Tiles Command+Control+W to edit a self-tiling texture live. First select the tiles that make up the texture—a single tile, or several in any arrangement—and Dottie compacts them into one editable group. A stroke that leaves an outer edge of the group reappears on the opposite edge, so the texture always stays seamless. With nothing selected, the whole sheet wraps.
While wrapping, Dottie surrounds the group with its wrapped copies at full opacity, so you can see exactly how the tiles meet on every side as you work. A dashed outline marks the editable group in the middle. The Smudge tool wraps too, so you can blend straight across a seam; Clone is unavailable while wrapping.