UpdateFields save option

Recently we’ve discovered that Aspose.Words has save option named “UpdateFields” which is TRUE by default (SaveOptions.UpdateFields | Aspose.Words for .NET).

What is the exact and complete impact of the UpdateFields save option(enabled and disabled)?
We want to ensure that it will not cause issues when we open, do some modifications and save files back. We want to make sure nothing will visually get changed in the files except the changes done by ourselves.
The documentation does not provide much data about this field, so any details will be appreciated.

Best, Vahe.

@vahem This option only affects saving in fixed page formats (PDF, XPS, images etc). If the value of saveOptions.UpdateFields is set to “true”, the document itself will call the Document.UpdateFields() method before saving it to an output file.
If you don’t want any visually changes in the output document when saving to flow formats, you might find it helpful to look at the UpdateSdtContent option.