NOTE: This setting needs to be enabled in your account. Please send us an email in case you do not have this option: firstname.lastname@example.org.
Please take the following steps:
Go to the weekly schedule and add a shift;
On the top of the pop-up screen you can see 'Affiliate'. Here you can select the location from which you'd like to borrow an employee. In the field 'Who' you can select the particular employee;
When you publish the shift, this employee will see the entire schedule-layer that he/she was scheduled on.