You can load parts into the Part comparison from all context menus (tabbed page Part selection [Structure tree, Symbols, Details], Part view [Table, Links], Search results).

Example: Call from context menu in Structure tree

You can load parts into the Part comparison via Drag & Drop (tabbed page Part selection [Symbols, Details], Part view [Table, Links], Search results).

Example: Loading from Part selection (Symbols)

Drag & Drop from Explorer window

As an alternative to loading via button Open 3D file... , you can draw desired files directly from an Explorer window into the Part comparison.

Note Using Drag & Drop there are 2 different modes: If you release the mouse key within a second over the tab Part comparison the part is overtaken but there is no changeover to the part comparison so that you can select further parts. If you stay over the tab Part comparison longer than a second, the application switches into the part comparison. If you then release the mouse key the part is overtaken into the part comparison.