Building lists, assigning drawing files

Drawing files that have not yet been assigned are displayed in the area at bottom right.

You can drag and drop drawing files into the Project Structure area.
When you drag a drawing file into the Project Structure area, it is attached below the level where the cursor is positioned when you release the mouse button.
To select a range of drawing files: press the Shift key and click the first and last drawing file in the range. To select a series of non-adjacent files, press the Ctrl key while clicking the drawing files.
To delete drawing files, drag them out of the Project Structure area and release the mouse button.
You cannot move drawing files within the Project Structure area. They have to be deleted first and then re-inserted.