Absolutely! To add additional fields on the Quote Line Entry Screen, follow these steps. (To add fields for admins only, see this article.)
Setup-->Customize-->Quote Line Item-->Field Sets
Create a new Field Set and make sure the API Name is "Line_Entry".
Add your fields into the Field Set and click "Save". Make sure you don't add too many fields, the intent is to keep the create screen very simple!
| NOTE: Fields included with the TYSO package (anything prefixed with our namespace prefix of tysoxrr__) will not be shown on the entry screen, even if you add them to your Fieldset. |