Customize your Redirects with the following settings.

Setting Description
Log 404 Redirects Log 'Page Not Found' errors as 404 Redirects. 404 Redirects will appear on the Redirects tab as a disabled 404 Redirect Element and can be updated to 301 or 302 Redirects.
404 Redirect Limit The total number of 404 Redirects that will be stored in the database per-site. When the limit is reached, the least recently updated 404 Redirects will be deleted from the Redirects stored for that site.