Place your cursor over Reference Data and left click on the sub-option Job Prerequisites.
A screen will appear with the top portion being display only of the jobs available in the IQS database accessed by a drop-down list.
At the bottom of the screen you will see "Experience prerequisites for selected Job" and "Training prerequisites for selected Job". That is where you will add, edit, and delete information from both of those tables.
Select the job that you would like to edit experience or training prerequisites to by left clicking on the Drop-down list button 
.
Scroll down and left click on the job that you would like to edit prerequisites.
The prerequisites will appear in the lower boxes.
Find the experience or training prerequisite that you would like to edit and left click on the Edit button 
on that line.
Enter the new experience or training prerequisite by selecting a prerequisite using the drop-down lists in the fields displayed in green . You can use the drop-down lists to select data by left clicking on the Drop-down list button . Then left click on the data you would like to select. You can also select data by using your up and down arrow keys on your computer keyboard to navigate through the list..
Use your Tab key on your computer keyboard to navigate through the fields or left click on each individual field.
Left click on the Update button 
to save the edited information.
Left click on the Cancel button 
if you do not wish to save.