The Environment tree-list displays all categories belonging to the loaded database.
Most of the database items can be accessed from this hierarchical list.
Selecting one item toggle views in the Diagram panel.
Double clicking (or Editing) items opens the Property window.
The tree-list contains all the Categories needed to build a full simulation environment.
Whenever a member of any Category is selected, the Drawing Area displays the corresponding graphical representation.
To
create a new member of one Category, first select the Category on the tree-list then use the

button below the tree-list. The new member will be created with a default name that can be changed by slowly double clicking it in the list.
To display the
Property Window of a Category Member, first select it in the tree-list then use the

button below the tree-list.
To
lock/unlock a member from being modified by the user (from the Drawing Area or using its Property Window), first select it in the tree-list then use the

button below the tree-list. The corresponding symbol normally shows/hides a red circle sign to indicate that the object is locked.
To
delete a member from the Category, first select it in the tree-list then use the

button below the tree-list. All references to the deleted
member/object are marked
_orphan and shown in red. Build is not possible if unresolved references still exist.
Use

to remove a selected item (or DEL key). You cannot remove Category entries:
The right mouse button displays a contextual menu to shortcut some push-buttons: