how can we select or highlight multiple rows from a current selected row

[anda_skoa]

Ah, it probably wasn't that obvious, but the QItemSelectionModel in the previous comment is actually a link to the Qt documentation for that class.
Which contains a link to the Qt model/View documentation, which has this section: http://doc.qt.io/qt-5/model-view-pro...-in-item-views

Cheers,
_