Datapicker can be created inside a project via in the context menu of project/folder or in the main toolbar. After that a new image can be added and can be changed via Plot in the corresponding dock widget.
After uploading image different zooming options can be used from the context menu/datapicker toolbar to change width and height of image. Image can also be rotated to an angle using Rotation in the "edit" section of dock widget. After this user have to set axis points.