Excalidraw — empty canvas
Playful / Toy-like · product UI flow
Steal · component patternmodel draft
The empty canvas is annotated with handwritten hints and hand-drawn arrows pointing at real controls: "Export, preferences, languages, ..." at the menu, "Pick a tool & Start drawing!" at the toolbar, "Shortcuts & help" at the help button. Steal onboarding drawn in the product's own medium and aimed at the actual controls.
Steal · component patternmodel draft
The top-center toolbar holds twelve tools, ten with a single-letter shortcut set small at the icon's lower right (V, R, D, O, A, L, P, T, N, E), and a grey line below explains panning with keycaps for "Scroll wheel" and "Space". Steal the shortcut letter printed on each toolbar button, which teaches the keyboard while the mouse is in use.
Steal · copywritingmodel draft
The center block puts the logo over a three-line warning ("Your drawings are saved in your browser's storage. Browser storage can be cleared unexpectedly. Save your work to a file regularly to avoid losing it.") and then a short menu: Open (Ctrl+O), Help (?), Live collaboration..., Sign up. Steal an empty state that says where the data is stored before the first stroke, followed by the few actions with their shortcuts.