Customize the Quote entry and form by adding new text field to the quote line items

Hello!

I'm new to the Sage CRM world.

I want to create a new field to show on the item line detail area of the Sales Quote.  Specifically I need an "Extended Description" field that is about 100 characters in length to be able to print out on the quote. 

I know and already created a new text field to the Quote entry window on the Quote header.  However that does not help with having a long comment on the item line detail

I also did not see any "user defined" fields in existence, so I guess creating a new field is the only way to go?  If not, I'm open to getting some suggestions.

Sage CRM 2018 R2 Customize the Quote entry and form by adding new text field to the quote  line items This is media from SAGE 100, but I'm not using the SAGE 100 interface.  Just the native Sage CRM sales quote tables and forms

Thank you

Lewis