All of the Available documentation for power Store is available on the power store support page:
powerstore/
on the Videos tab of the power store support page there is a video tutorial for the content management system named "Managing Content in PowerStore"
the current new pod on the home page will show the latest 2 news entries.
if you want it to show more than 2 enteries, edit the webassist/plugins/cms_templates/news.php page.
change:
if (!isset($newsArticles)) {
$newsArticles = 2;
}
to the number of articles you would like displayed.