# View And Compare AutoCAD DWG Drawing Versions

<code class="expression">space.vars.PRODUCT\_NAME</code> will preserve the version history of your AutoCAD® DWG drawings when saving to a <code class="expression">space.vars.PRODUCT\_NAME</code> network drive. Your drawing revisions can be recalled using the <code class="expression">space.vars.PRODUCT\_NAME</code> version history feature.

From the version history you can view the changes made to your drawing, restore older versions, open a version or compare versions using AutoCAD's® drawing compare feature to identify differences between revisions.

Use the <code class="expression">space.vars.PRODUCT\_NAME</code> [version history](/user-guide/revert-changes-to-a-file.md) command to recall your editing history and compare revisions.

<figure><img src="/files/1Dh7kfT0ftmtMEJBQqGC" alt=""><figcaption></figcaption></figure>

After choosing the compare command, AutoCAD® will start up and show the changes between the drawings.

<figure><img src="/files/mQdrmyQKLFl0HCB3Xahy" alt=""><figcaption></figcaption></figure>

If you have the "Create backup copy with each save" enabled in AutoCAD® then consider setting the ISAVEPERCENT command to 0 as this will ensure that your drawing is uploaded to SharePoint Online with each save.

<figure><img src="/files/Ud9tWRNJxCr4VLgE6Oan" alt=""><figcaption></figcaption></figure>

<code class="expression">space.vars.PRODUCT\_NAME</code> will not create AutoCAD® BAK files when saving as previous drawing versions are preserved in the DWG version history instead.

The drawing compare feature will work only on a supported version of AutoCAD® and where it is the default associated application for .DWG drawing files.


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