Select an object by pressing the button at the top of the window. Then you click above the drawing area and the selected object is appearing to this. By clicking many times when an object is selected you can add many similar objects.
Notice:When you want to release an actived button you have to press Arrow button. Then you can select active attributes inside the entity also.
Attribute is an property for an entity or a relation. It can join to an entity or to a relation also. All the fields, which can define for attribute, are defined in the configurationfile. One attribute of an entity have to be primarykey.
Notice:Attributes can be inside or outside the entity.
Relation can be between two or more entities. It reflects the relation between two entities. The relation must have cardinalities, which you can define for the lines.
An entity is a thing or an action which can be regocnize.
The line must have cardinality. Cardinality have to be defined to relations, in this case to two lines. Its value can be empty, 1 or M. These three character are defined in the ER-configurationfile too. The true cardinality is one-to-one(1-to-1), one-to-many(1-to-M) or many-to-many(M-to-M). The lines which have an attribute as another target must be empty and the lines which have a relation as another target must be 1 or M.
When there are objects in the drawing area you can choose one object active by pressing it with mouse. The information panel about this object open on the left side of the window. The selected object is situated in a red box. If you are working with the entity which can include attributes the information panel about this entity open on the left side of the window. And by clicking an attribute you can select them instead of the entity.
You can choose many objects by pressing the Control button and at the same time clicking the objects. All objects which are selected are surrounded by a red box. The information panel does not open.
When an object is selected active the information about it is on the information panel on the left side of the window. Clicking with mouse above the text area you can add for example the name for the object. In some fields there is combobox or checkbox in whice you can choose the alternative. All the fields are defined in the configurationfile. By pressing F2 you can get the cursor at the textfield.
Notice! Advance only normal characters, not for example ä,ö or å
If you want to delete an object you select them active and press Delete button or select Delete from the menu.
Notice:If the cursor is in a textfield in the Informationpanel you can delete only the text not an object. By clicking Arrow button at the top of the window you can get the cursor out of the textfield.
By pressing mouse and keeping it down you can move a selected object. If you are moving many objects at the same time you have to press Control button too.
By selecting Line object and clicking on the drawing area first an object and then another object you can connect the two objects with a line. A line always has a cardinality. If you are connecting an attribute to an entity the cardinality is empty (or 1). And if you are connecting an entity and a relation is cardinality 1 or M.
By pressing this button none of objects is selected.