Check documents in and out of a document library
The checkout process lets you collaborate with others on the same set of documents. It provides a method for controlling and tracking the changes that are made to the documents. You can check out a document if it is not already checked out by someone else. By checking out a document, you can temporarily prevent others from making changes to it.
You can make changes to a document after checking it out. When you are ready for others to view the changes that you made, you can check in your version of the document to the document library. After the document is checked in, your version of the document can be checked out by someone else.
If your organization’s document management system supports version tracking, you may have the option of adding a version description or choosing a version type, such as a major or minor version. Major versions (1.0, 2.0 and so on) can be used for making important changes in your drawing, whereas minor versions (1.1, 1.2, 1.3 and so on) can be used for making light edits. In addition, depending on how the permissions are set up in your document library, a minor version might be treated as a draft document that only certain users can access.
When you check out a document, a copy of the document is saved to your working folder. You can modify this copy of the document and save the changes locally, without sharing them with others. You can also keep working on the copy of the document when you are offline. You can repeatedly close and reopen the copy without affecting the checkout status and then check in the document when you are online again.
You can undo a checkout at any time. Undoing a checkout lets you discard all changes that you made to the document since you checked it out. If you choose to keep the document open after undoing a checkout, the working copy becomes a read-only version.
To check a document out of a document library
on the Document Management toolbar (View 
Toolbars Document management).
When you check out a document, a copy of the document is saved to a working folder on your computer.
To check a document in to a document library
on the If you copy a file to another location and make changes to the file, you will not be able to check in the changes from within CorelDRAW. Instead, you must either check in the file directly in SharePoint or copy the file to the working folder and then check the file in from within CorelDRAW.
The availability of major and minor versions depends on the settings of your organization’s document management system.
To undo a document checkout
on the 
Undoing a checkout discards all the changes you made to the document. If you want to save a copy of the document that has your changes to a local folder, click File Save As.