With Office Web Apps in SkyDrive, you have access to your Office documents whenever you have access to the web. You can make edits on the fly in a web browser, and you can easily open them in Microsoft Office to make extensive changes.
First, sign in to http://skydrive.live.com. Go to the folder where your document is stored, right-click the document, and then click Edit in Browser.
Your document opens in Office Web Apps, where you can make changes using the familiar look and feel of the Office desktop applications.

Note If you’re working with a Word document that includes drawings or other objects that can’t be displayed in Editing view, these objects are displayed as placeholders.
Fig. 1 In Reading view, Word Web App displays all content and formatting.
Fig. 2 In Editing view, Word Web App displays some objects as placeholders.
If you want to make changes that require the full set of capabilities found in the Office desktop applications, click the command to open the document in the appropriate desktop application (Open in Word, Open in Excel, Open in PowerPoint, or Open in OneNote).
For more information about how to use Office Web Apps see Introduction to Office Web Apps.