Example: Multiple Checkbox Field has option 1, option 2, option 3. 

When option 1 is selected from the field, the description gets updated with option 1. If option 2 is selected afterward from the checkboxes then the description is updated, but duplicates the first option and adds the section option along the same line. I would like for the script to allow a user to select option 1 to add it into the description and when the user sections option 2 that it adds it to the description in the next line. 

The final result should look like this in the description field. 

Option 1
Option 2 

Here is the basic script I am using but I do not know how to ensure the get value function selects just the option from the checkboxes rather than the whole field. 

var description_content=$CS.getDescription();

var Full=$CS.getValue("WorkOrder_Multi_Fields_45601_UDF_CHAR1");

var new_description_content=Full + ' QTY:' +description_content;

$CS.setDescription(new_description_content);