User manual

Preventing and recovering lost changes
The Autosave feature guards against losing your work in case of a power failure by
incrementally, and at regular intervals, saving file changes to a specified location. The
original file is not modified. Instead, Acrobat creates an autosave file of changes, which
you can recover in the event of a power failure or other problem. An autosave file includes
the changes you made to the open file since the last automatic save. You can apply the
changes to the original files when you restart Acrobat. The amount of work lost depends
on the time interval you set between saves and when your system problem occurred.
When you close, save manually, or revert to the last-saved version of a file, the autosave
file is deleted. Frequent automatic saves prevent loss of data, and are especially useful if
you are making extensive changes to a document, such as adding comments to an email-
based review. (See Participating in an email-based review.)
The amount of new information that the autosave file contains depends on how frequently
Acrobat saves the autosave file. For example, if the autosave file is saved only every 15
minutes, your autosave file won't contain your last 14 minutes of work before the problem
occurred.
Note: If you use assistive technology, such as a screen reader, you may want to disable
the Autosave feature so that you don't lose your place when the file is reloaded.
The AutoSave feature is not supported in the following cases:
● A document that has its security changed. Changes to the security of the document disable
automatic saving and display a message in the Security panel of the Document Properties
dialog box. You must save the document to reenable automatic saving of document
changes.
● A document created using the WebCapture feature or extracted from a larger PDF
document (Document > Extract Pages). You must save the document to enable automatic
saving of document changes.
● A document displayed in a web browser or incorporated into a container document that
supports Object Linking and Embedding (OLE). This document appears outside the
default file system and cannot support automatic saving.
To set up automatic saving:
1. Choose Edit > Preferences > General (Windows) or Acrobat > Preferences > General
(Mac OS).
2. Select or deselect Automatically Save Document Changes To Temporary File Every xx
Minutes (1-99). (This option is on by default and set to 5-minute intervals.)
3. In the Minutes box, specify how often you want Acrobat to save files. The more
frequently you save files, the more information is recovered if your system shuts down
while the file is open.
To reopen a file after an unexpected shutdown:
1. Start Acrobat or open the file you were working on last.
2. When prompted, click Yes to open the autosave file or files. If multiple files were open,
Acrobat opens all of the files for you.
3. Save the file or files with the same names as the files you were originally working on.