# Editor Quick Checklist 1. Select 2-3 paragraphs, open block menu, convert to code block. Expected: merged into 1 code block, selection remains on that block. 2. Select 2-3 contiguous blocks, click move up/down. Expected: all selected blocks move together in one step. 3. Select 2-3 contiguous blocks, drag using the block handle. Expected: drag preview shows "will move N blocks", all blocks move together. 4. Select multiple blocks, run copy/delete/duplicate from block menu. Expected: operation applies to all selected blocks. 5. After each multi-block action, press `Ctrl/Cmd + Z` once. Expected: the full action is reverted in one undo step. 6. Open block menu and expand "查看快捷键". Expected: shortcuts are visible and menu remains usable.