How to Recall / 回忆操作说明
Tap a numbered position to fill or replace it with a card below. You may skip positions and return later. Each deck saves its own answers automatically. Insert Before / After shifts later positions; Delete clears the selected position; Undo restores the last change.
点击编号位置，再从下方选牌；可以跳过空位稍后补填。切换副数会自动保存。前后插入会移动后续位置，删除只清空当前位置，撤销可恢复上一步。