Adjust template of widgets

When adding own widgets, it might be necessary to provide custom templates. In such a case the file path containing the template files needs to be added. Thats done in the same way as for other Extbase backend modules:

module.tx_dashboard {
    view {
        templateRootPaths {
            110 = EXT:extension_key/Resources/Private/Templates/Dashboard/Widgets/

The location of that snippet depends on your setup and preferences. Add it in database "Setup" config field of an "Template" sys_template record. Or follow one of the other file based ways. See TypoScript configuration.