Hi.
Please go through this information:
About tracking changes
Microsoft Excel can maintain and display information about how a worksheet
was changed.
Change tracking logs details about workbook changes each time you save a
workbook. You can use this history to understand what changes were made, and
to accept or reject revisions.
This capability is particularly useful when several users edit a workbook.
It's also useful when you submit a workbook to reviewers for comments, and
then want to merge input into one copy, selecting which changes and comments
to keep.
How change tracking works
When you view the change history (change history: In a shared workbook,
information that is maintained about changes made in past editing sessions.
The information includes the name of the person who made each change, when
the change was made, and what data was changed.), either directly on the
worksheet or on a separate History worksheet (History worksheet: A separate
worksheet that lists changes being tracked in a shared workbook, including
the name of the person who made the change, when and where it was made, what
data was deleted or replaced, and how conflicts were resolved.), you see who
made each change, what type of change was made, when it was made, what cells
were affected, and what data was added or deleted.
Change tracking is available only in shared workbooks (shared workbook: A
workbook set up to allow multiple users on a network to view and make changes
at the same time. Each user who saves the workbook sees the changes made by
other users.). In fact, when you turn on change tracking, the workbook
automatically becomes a shared workbook, although you don't have to store the
workbook where others can access it.
Change tracking differs from undo and backup Unlike the Undo button, you
can't use the change history to back out changes. However, the history
includes a record of any deleted data, so that you can copy lost data from
the History worksheet back to the original cells. Because change tracking
isn't designed to help you return to earlier versions of a workbook, you
should continue to back up workbooks that have change tracking in effect.
Some types of changes aren't tracked Changes you make to cell contents
are tracked, but other changes, including formatting changes, are not. Some
Excel features are unavailable in shared workbooks and therefore aren't
tracked.
History is kept only for a set interval When you turn on change tracking,
the history is kept for 30 days. This limit keeps workbook size manageable.
You can increase or decrease the number of days of history to keep. If you
want to keep the history indefinitely, you can specify a large number of
days, or you can make periodic copies of the history information.
How history gets deleted Excel determines what history is kept by
counting back from the current date. Each time you close the workbook, Excel
erases any part of the change history that is older than the number of days
in effect the last time the workbook was saved.
For example, if you're keeping 30 days of change history, and you open a
workbook for the first time in two months, you'll be able to view the history
from two months ago. However, when you close this workbook, the history from
31 to 60 days ago is deleted.
If you turn off change tracking or stop sharing the workbook, all change
history is permanently deleted.
How to use change tracking
Excel provides the following ways to access and use the stored change
history (change history: In a shared workbook, information that is maintained
about changes made in past editing sessions. The information includes the
name of the person who made each change, when the change was made, and what
data was changed.).
Highlight onscreen Excel can outline changed areas in a different color
for each user and display the basic details as a comment when you rest the
pointer over each changed cell. Onscreen highlighting is useful when a
workbook has only a few changes, or you want to see at a glance what's
changed.
History worksheet Excel can display a separate worksheet that provides
full details in list form, so that you can filter (filter: To display only
the rows in a list that satisfy the conditions you specify. You use the
AutoFilter command to display rows that match one or more specific values,
calculated values, or conditions.) to find changes of interest and print the
information. This History worksheet (History worksheet: A separate worksheet
that lists changes being tracked in a shared workbook, including the name of
the person who made the change, when and where it was made, what data was
deleted or replaced, and how conflicts were resolved.) is useful when a
workbook has lots of changes, or you want to investigate what happened in a
series of changes.
Review changes Excel can step you through the changes in sequence using a
dialog box that lets you decide whether to accept or reject each change. This
method is useful when you're evaluating and working with comments from others.
Challa Prabhu
