You can check the status of the manuscript you submitted on the Author menu's [Current Submission > Submissions Being Processed].

In the [Upload files] step when submitting a manuscript, you can upload the original file. You can upload files that corresponds to the file type (PDF, Word, etc.) set by the journal.

If you click the title of the manuscript you want to check in the [Current Submission > Decision Completed] of the Author menu, you can see the review comments, and you can submit the review response with the revised/final manuscript.

By clicking the title of the manuscript to be submitted in the [Current Submission > Submit Manuscript] of the Author menu, you can submit the review response with the revised manuscript.

You can submit the final version of the manuscript for which ‘Accept’ is decided in the [Current Submission > Submit Manuscript] of the Author menu.

If you do not submit the revised/final manuscript after the decision is made, the review process for the manuscript will no longer proceed. However, it cannot be deleted from the lists of [Current Submission > Submit Manuscript] menu and [Current Submission > Decision Completed] menu.
You can also withdraw the manuscript. After requesting withdrawal of the submitted manuscript to the editor-in-chief, who then approves it, the manuscript will be deleted from the list..