Checking out a file changes the read-only attribute of the local copy to read/write. Once a file is checked out, it can be edited.
Only one member of a team can check out a file at one time. No one else can modify a checked out file until it has been checked back into the vault. Refer to the User Name column to determine who has a certain file checked out. You can check out one file, multiple files, or all files in a folder.
You have the option of selecting a specific version or revision of a file to get, otherwise the Get operation defaults to the latest version of the file in Vault Basic and the latest version of the leading revision in Vault Workgroup and Vault Professional.
The file can also be checked out by selecting the check box in the Get\Check Out dialog.
You must check the file back in to save your changes to the vault.
You can also use the Undo Check Out command to discard all changes made to the local copy and reverse the check out. The file in the vault is not updated.
To return the file to the vault, you can use the Check In command to confirm your changes and copy your local, modified file into the vault. You can also use the Undo Check Out command. Undo Check Out does not update the vault. All the changes made to the local copy since you last checked out the file are lost.