> For the complete documentation index, see [llms.txt](https://help.smallbuilder.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.smallbuilder.com/smallbuilder-line-items/builder/builder-setup-steps/setup-line-item-editor.md). # Setup Line Item Editor Configure the properties of the fields used in the Line Item Editor. For each selected record from the Lookup Selector, define attributes such as price, discount rate, quantity, and more.
1Line Item Field Configuration
Select fields from the Line Item object to be used during editing, and configure their default values and attributes.
2DataSource
Use DataSource to display additional data beyond the Lookup object records. You can also utilize Apex Classes to handle complex logic or fetch data through external interfaces, enabling advanced data display in the Line Item Editor.
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