Adding ACE Subsystems

With a single item selected the functionality is the same as double clicking an item in the list. However, the "Add Selected Subsystem" allows you to add multiple systems at the same time.

The list of plug-ins allows multiple items to be selected using the standard keyboard shortcuts for multiple list item selection. 

For example: 

1. Hold the Ctrl key and click multiple individual entries to select.
2. Select a range of contiguous entries. Select an item (the first in the range). Hold the Shift key and select another entry (the last in the intended range). All items between the first and last will be selected.

Clicking the "Add Selected" button results in the System view opening with all the selected subsystems having been added: