The recycle bin is where all the deleted elements from a project are being transferred. 

Functionality

There are 2 ways of deleting elements in a Project. You can either delete them from the Model Viewer (and therefore the Element Id tab) or from the Element Mark tab. The biggest difference between those 2 ways has to do with the fact of deleting an element permanently (no way of restoring them) or temporarily (can be restored).

Delete Elements Permanently (Without Restore)

In order to delete elements permanently from the database (there will be no way of getting the elements back in Project Manager), we need to delete them from the Element Mark tab. That means that we are deleting the element mark and Id of the element for good. 

You need to find the elements that you want to delete in the Element Mark and select them, as in the following picture and then right click and press Delete.

The following messages will appear and if you want to delete them press Yes:

Note: If you select multiple element marks you can press "Yes to all", so the message will not be repeated. If you press just "Yes" the message will be repeated as many times as the element marks that have been selected. 

Attention: If the element mark includes multiple elements then ALL the elements will be deleted permanently. If you want only to delete a specific element from the same element mark pool, then look in the following in "Delete Elements Temporarily" chapter.

An extra message will appear if the element that you are trying to delete has also drawings.

After deleting completely the elements the recycle bin should look like that:

Permanent deletion is successful and there is no possible way of restoring the elements in the database. The element Mark now is free to be used for some replacement elements, that needs to be drawn from scratch.

Delete Elements Temporarily

In order to delete elements temporarily (which means that