There are several options how to insert text in the drawing are. The different options are suitable for different situations:
Static text - If you wish to insert text in the drawing area that you wish to be able to edit. For example, you can decide how the text shall be aligned in the text box, the font size etc.
Dynamic text - A more advanced feature. Beside everything you can do when inserting static text, you can also insert different field variables.
Label - If you wish to insert a very simple text in the drawing area.