1. On HR Tools > HR > Schedule, click + Add Shift (top right), or hover the day cell in an employee/role row and click + Add to pre-fill that employee or role.
2. In the Add Shift window choose Assign to (employee), set the Shift window start and end times, pick the Role & color (role dropdown plus a color swatch), and under Repeat on tick the weekdays that should get a copy of this shift (the clicked day is pre-ticked).
3. Click Create Shift.

The date comes from the day you clicked (today when using the top button). Required: an employee, start time, end time and at least one weekday, otherwise you see "Invalid Employee !", "Invalid start time !", "Invalid end time !" or "Invalid week days !".