How can i active versions on lion?

Question

i've tried using pages and numbers..or even word..but i can't find the option of viewing the versions of my document..after a while working on it..
do I have to activate versions?

Answer 1

From the Help menu:
To browse archived versions of your document:
Open the document for which you want to access older versions, and hold your pointer over the name of the document at the top of the Pages application window.A triangle appears.
Click the triangle and choose Browse All Versions.The view changes to show snapshots of all saved versions of the document receding against a background of stars. A timeline along the right side of the screen indicates when the frontmost version on the right was saved.
Drag the handle along the timeline to move back through time and look at older versions of the document.
When you find a version that you want to inspect more closely, click its image.The version moves to the foreground, where you can click different documents to view them, select items on a page, open the Inspectors, and copy objects or inspector settings.
Do any of the following:
To completely restore the older version, click Restore when the version you want is in the foreground. The restored document appears on your regular desktop, replacing the last version you were working on prior to viewing the older versions. (That version is then saved in the timeline, if you want to retrieve it.)
To restore only an object or inspector setting from the older version, copy the object or setting by selecting it and pressing Command-C, and then click Done to return to your regular desktop. Paste the object or setting where it’s appropriate by pressing Command-V.
To compare the older version side-by-side with the current version, click Current Document.
To return to your regular desktop, click Done.