在首页“导入乐谱 PDF”下点击“点击选择 PDF 文件…”，从“文件”选择已下载的 PDF。选择“跳过校准，进入乐谱”即可手动阅读。拒绝启用眼控或相机权限后，导入、手动阅读和节拍器仍可使用。

启用眼控前，请阅读说明并选择当前使用者类别；未满 14 周岁由监护人确认。允许前置相机后，保持实际演奏姿势、头部稳定在取景框内，按提示完成 25 点校准。加载已有档案时，完成取景和中央注视检查。

请先回到校准时的设备位置、坐姿和看谱距离，并确认光线及相机取景。明显偏移仍未改善时，重新校准。校准误差数值仅供参考，演奏前请先试用滚动和快捷跳转。

点击阅读页工具栏“退出”回首页或重新启动应用后，需要重新导入乐谱并设置快捷跳转位置。已保存的校准档案会保留，iPad“文件”中的原 PDF 不会因此被删除。

如需补充排查信息，在应用菜单“改进与建议”中点击“收集问题数据”。点击“开始收集”后复现问题，再点击“结束收集”；最多 5 分钟，到时自动生成问题包。进入后台、切换语言或取消收集会停止并清除本次记录。

问题包生成后，你可以选择保存、分享或取消，不会自动发送。如需发送，请选择分享，或先保存后作为附件发送至上述邮箱。普通反馈不需要提供问题包。未满 14 周岁的问题收集和导出分别由监护人确认。

On Home, under Import PDF Score, tap “Tap to select a PDF…” and choose a downloaded PDF from Files. Tap “Skip Calibration and Open Score” to read manually. Score import, manual reading, and the metronome remain available if you decline eye control or camera access.

Before enabling eye control, read the notice and select the current user’s age group. A guardian confirms for users under 14. Allow front-camera access, maintain your playing posture with your head steady in the frame, and follow the 25-point calibration. Complete the framing and central-target checks when loading a saved profile.

Return to the device position, posture, and viewing distance used during calibration. Check the lighting and camera framing. Recalibrate if a clear offset remains. Calibration error values are a guide; try scrolling and jump positions before playing.

After tapping Exit in the reader to return to Home, or restarting the app, you need to reimport the score and set jump positions again. Saved calibration profiles are retained. This does not delete the original PDF in Files.

In the app menu, open Feedback and Suggestions > Collect Diagnostics. Tap Start Collection, reproduce the issue, then tap Finish Collection. Collection ends automatically after 5 minutes and creates a package. Backgrounding, changing language, or canceling collection stops it and clears the records.

Once the package is ready, choose Save, Share, or Cancel; it is not sent automatically. To send it, use Share, or save it first and attach it to an email to the address above. A package is not required for ordinary feedback. A guardian confirms diagnostic collection and export separately for users under 14.