//! [0]
cursor.clearSelection();
cursor.movePosition(QTextCursor::NextWord, QTextCursor::KeepAnchor);
cursor.insertText("Hello World");
//! [0]


//! [1]
QImage img = ...
textDocument->addResource(QTextDocument::ImageResource, QUrl("myimage"), img);
cursor.insertImage("myimage");
//! [1]


//! [2]
QTextCursor cursor(textDocument);
cursor.beginEditBlock();
cursor.insertText("Hello");
cursor.insertText("World");
cursor.endEditBlock();

textDocument->undo();
//! [2]


//! [3]
QTextCursor cursor(textDocument);
cursor.beginEditBlock();
cursor.insertText("Hello");
cursor.insertText("World");
cursor.endEditBlock();

...

cursor.joinPreviousEditBlock();
cursor.insertText("Hey");
cursor.endEditBlock();

textDocument->undo();
//! [3]