The Survey123 web design site has an option under the Other section (when editing the settings for a question):
"Cache answer to this question"
Is there any more information on this setting?
Where is this setting saved?
I opened the form in Survey123 Connect, and could not find any setting in either the XLSform or the various Settings.
The 'cache answer' option stores the answer in your browser's cookies. There isn't an equivalent setting for a question to set through Survey123Connect; instead, the Survey123 field app has the ability to save a full form's answers as the 'favorite', or template, answer set.
The current web form has slightly different settings than the XLSForm standard; it stores this information in a table that accompanies the layer that stores the survey submissions.