In Crelate, you can select multiple candidates at one time by using the Control (ctrl) and Shift keys.
CTRL and Shift keys will differ in use
The CTRL key allows you to click and select multiple files that on your file list. These contacts do not necessarily need to be located next to one another.
Shift allows you to select a group of files that are contiguous (i.e. next to each other) by clicking one contact, and then holding Shift and clicking the last contact. This will select all contacts in between.