Describe the shared lists with drag and drop, + and x

- Pixel Art, Tilemaps and Vector Art explain reordering by drag and
  drop, the eye, the + in the list header and the x per row.
- Development carries the new check total 1266.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Development.md

@@ -13,7 +13,7 @@ npm run check        # typecheck + lint + format:check + tests, the gate CI runs
 npm run build        # writes dist/ and regenerates index.html
 ./build.sh           # the same under `set -o pipefail`, for callers that pipe the output
 php tools/make-user.php <name> <password>                     # an account; every tool signs in (see Accounts)
-node tools/seed-e2e.mjs && node tools/e2e.mjs                 # 1259 editor checks, screenshots in /tmp/gm-e2e-*.png
+node tools/seed-e2e.mjs && node tools/e2e.mjs                 # 1266 editor checks, screenshots in /tmp/gm-e2e-*.png
 GM_STEPS=20 node tools/e2e.mjs                                # or 1-12, or 6,20 — a subset while working on one step
 ./e2e.sh start [GM_STEPS]                                     # the same run detached, see below
 ./e2e.sh status                                               # live progress, or the last run's result

Pixel-Art.md

@@ -64,12 +64,14 @@ replacing a colour) are [#200](https://git.nockal.com/meleki/game-maker/issues/2
 
 ## Layers
 
-The **LAYERS** list shows the top layer first. A click on a row picks the layer the tools paint on.
+The **LAYERS** list shows the top layer first. Each row pictures its layer alone on the frame being
+painted. A click on a row picks the layer the tools paint on.
 
-- **Add** puts a new empty layer above the picked one, **Delete** takes the picked one out. The last
-  layer stays.
-- **Up** and **Down** move it in the drawing order.
-- **Hide** leaves it out of the picture, **Show** puts it back. A hidden layer cannot be painted on.
+- **Dragging** a row moves the layer to another place in the drawing order.
+- The **eye** next to a row's ✕ leaves the layer out of the picture, and puts it back. A
+  hidden layer cannot be painted on.
+- The **+** in the list's header puts a new empty layer above the picked one. The **✕** at the right
+  end of a row takes that layer out. The last layer has no ✕, it stays.
 - **Name** and **Opacity** (0 to 1) edit the picked layer.
 - **Merge down** lays the layer onto the one below it, on every frame, and takes it out. Every pixel
   it paints covers the one below. Its opacity is **not** kept: an indexed picture has no colour
@@ -77,11 +79,12 @@ The **LAYERS** list shows the top layer first. A click on a row picks the layer
 
 ## Frames
 
-Every frame has the same layers. The **FRAMES** list shows them in order; a click picks the frame
-the canvas shows and paints on.
+Every frame has the same layers. The **FRAMES** list shows them in order, first on top, each row with
+a picture of the whole frame; a click picks the frame the canvas shows and paints on.
 
-- **Add** puts an empty frame after the picked one, **Duplicate** a copy of it. The last frame stays.
-- **Earlier** and **Later** move the picked frame.
+- **Dragging** a row moves the frame to another place in the order.
+- The **+** in the list's header puts an empty frame after the picked one, **Duplicate** below the
+  list a copy of it. The **✕** on a row takes that frame out. The last frame has no ✕, it stays.
 - **Onion skin** (in the **VIEW** block) shows the frames before and after the picked one faintly
   under it.
 - **PREVIEW** plays the frames in a loop. **Frames per second** belongs to the preview only; how long

Tilemaps.md

@@ -99,12 +99,13 @@ itself. Without one chosen, painting says so instead of quietly doing nothing.
 ## Layers
 
 A tilemap holds one or more layers, listed under **LAYERS**, the topmost row being the one drawn
-last (over the others). Per row there is:
+last (over the others). The list works like every layer list of the editor (the shapes of
+[Vector Art](Vector-Art), the layers and frames of [Pixel Art](Pixel-Art)):
 
-- a **switch**: a layer switched off keeps its cells and is left out of the drawing, in the editor
-  and in the game alike;
-- its **name**, which is also how it is chosen to paint on;
-- **↑ / ↓** to move it in the drawing order and **✕** to remove it, cells and all.
+- a click on a row chooses the layer to paint on;
+- **dragging** a row moves the layer to another place in the drawing order, one undo step;
+- the **eye** next to the ✕ switches the layer off and on: a layer switched off keeps its cells
+  and is left out of the drawing, in the editor and in the game alike.
 
 Below the list (#138):
 
@@ -124,8 +125,9 @@ Below the list (#138):
   paint, not a property of the map: it touches neither the project nor the game, a map that is not
   selected is always drawn whole, and the layer switches above stay as they are.
 
-**Add layer** appends one on top. A tilemap always keeps at least one layer — there has to be
-something to paint on.
+The **+** in the header of the list appends a layer on top. The **✕** at the right end of a row
+removes that layer, cells and all. A tilemap always keeps at least one layer — there has to be
+something to paint on, so the last one has no ✕.
 
 ## In the running game
 

Vector-Art.md

@@ -105,14 +105,18 @@ Selecting a shape — in the tab or in the list — gives it its own rows:
   **topmost row is drawn last**, the way a layer list reads.
   Ctrl or Shift on a row adds its shape to the selection, as Ctrl+click does in the tab.
 - **Forward / To front / Backward / To back** move the selected shape through that order, and a row
-  can be **dragged** to another place in the list.
+  can be **dragged** to another place in the list, also one that was not selected before: it is
+  selected when the mouse button goes up. The **✕** at the right end of a row removes that shape.
+  The same list is used for the layers of a [tilemap](Tilemaps) and the layers and frames of
+  [pixel art](Pixel-Art); there its header also has a **+** that adds one. Shapes have none, they
+  are drawn with the Pen.
 - **COMBINE** holds the four boolean operations, see [below](#combining-shapes).
 - **VECTOR SHAPE** carries Name, **Fill type** with what that type needs, Opacity and an
   **Outline** switch; with the switch on, **Line type** and Line width appear. The switch *gives and
   takes away* the outline rather than hiding it, and a width of zero is no outline, so the row stops
   at 0.1.
-- **Delete shape** and **Add shape** sit below; with several shapes selected it reads **Delete
-  shapes** and removes them all.
+- **Add shape** sits below. With several shapes selected, **Delete shapes** next to it removes
+  them all.
 
 With several shapes selected, the order buttons and the style rows are those of the one clicked
 last. A dragged colour or opacity slider is one undo step, not one per pixel of the drag. Selecting