Custom Field in Quote LINE

Hello guys i want to put a custom field that i have create in the studio (dropdown) in the quote (LINE ITEM) but i cant i have do all and dont appears.

I want a dropdown like the one that come as default called Discount Type i want one like that but that said intate of Pct or Amt said Monthly, Anually

here is a image.
http://www.awesomescreenshot.com/image/213983/1c00a977efbf894026b7e7ee32b1c2c4

Hi,

You have to customize quote module for that.

Have a look at AOS_Quotes and AOS_Products_Quotes module.
Check file Line_items.php and line_items.js under Product_Quotes module.

Regards,
Alpesh