Online

This option is intended to be used by those who would like to edit the document within TI without downloading the file. Choosing this option will immediately open the Document Viewer in Edit Mode, where the user can perform any necessary changes to the document. While checked out, the document is locked for all other users preventing inadvertent overwriting or conflicting edits. Other users will be able to view and download the current effective version of the document, but they will not be able to check it out until it has been checked back in. See the screenshot below.

https://tiug.trialinteractive.net/Topics/online%20edit.jpg