Star Placement Desk

How it works: each click on the picture drops a new star at that exact spot. Click an existing star to select it (an orange ring appears); click a different star next to connect a line between them — click that same pair again to remove the line, or remove it any time from the "Lines" list above with its × button. Drag a star to move it. Name a star by typing in its row, and tap the circle button to mark it as a highlighted (red) star. Press ⌘/Ctrl+Z to undo (and add Shift to redo) — it works anywhere except while you're actively typing in a name field. Everything saves on its own a moment after you stop editing.