To modify any text or picture: double click on it. You enter the editor where you can change both content and style (text) or size (picture).

Once modified, click on "save and apply" to see how the temporary changes apply. If you are satisfied with the changes and want to make it final, click on the top icon "Save".

To resize this text: Left click, press the "Shift" key and move the mouse all at the same time. Go to help for more information.