> For the complete documentation index, see [llms.txt](https://help.getupnote.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.getupnote.com/ko/support/help-center.md).

# Help Center

#### Account

* [Unable to sign in](/ko/resources/troubleshoot-issues/cant-sign-in-to-account.md)
* [Change sign-in methods](/ko/get-started/manage-your-account/manage-sign-in-methods.md)
* [Change email and password](/ko/get-started/manage-your-account/change-email-and-password.md)
* [Forget/reset account password](/ko/get-started/manage-your-account/reset-password.md)
* [Forget lock password/unable to unlock UpNote](/ko/safety-and-control/lock/forget-lock-password.md)
* [Can I recover my deleted account?](/ko/get-started/manage-your-account/delete-account.md#faq-can-i-restore-my-deleted-account)

#### Data

* [Unable to sync notes](/ko/resources/troubleshoot-issues/sync-not-working.md)
* [Restore missing notes](/ko/resources/troubleshoot-issues/restore-missing-notes.md)
* [Images do not show up](/ko/resources/troubleshoot-issues/images-not-displaying.md)
* [Where does UpNote store my data?](https://getupnote.com/support.html)

#### Premium

* [Questions about Premium](/ko/resources/upnote-premium.md)
* [I have purchased Premium but it is not showing up](/ko/resources/upnote-premium.md#i-have-purchased-premium-but-it-is-not-showing-up)
* [I'm still charged for a monthly subscription after switching to the lifetime plan](/ko/resources/upnote-premium.md#im-still-charged-for-a-monthly-subscription-after-switching-to-the-lifetime-plan)

#### Using UpNote

* [Keyboard shortcuts](/ko/resources/keyboard-shortcuts.md)
* [Export notes](/ko/import-and-export/export-notes.md)
* [Import to UpNote](/ko/import-and-export/import-content-to-upnote.md)
* [Rearrange notebooks in the sidebar](/ko/organize-and-manage-notes/organize-with-notebooks/sort-notebooks-in-the-sidebar.md)
* [Show hidden notebooks in the sidebar](/ko/organize-and-manage-notes/organize-with-notebooks/hide-and-show-notebooks.md)