@mrjj Thakn you.

@Chris-Kawa Hi..
Ok, we have one model , we are continuously appending data, on that time scroll will be always at bottom, even if we scroll to top , it will come back to bottom, until wee stop appending.
void CustomeTableView::createTabel(QString thText)
{
if(modelList.count()<=25000)
{

modelList.append(thText); numRows = modelList.count(); for (int row = 0; row < numRows; row++) { for (int column = 0; column < numColumns; column++) { QStandardItem *item = new QStandardItem(modelList[row]); fsModel->setItem(row, column, item); } } }

}

That's not how it works and not something I would expect either.

The mdi sub-windows will only extend in the mdi area, nothing more.

The behavior you are looking for, you'll have to implement yourself.

MainWindow can be a QMainWindow or a QWidget depending on what parameter you choose