GL Lines validates data in each field, line, and in the entire grid.
When you enter data in a field and press tab or click on a different field in the same line, GL Lines validates the content of the previous field based on the validator configuration set for that field.
When you press tab to move the cursor on a field in the next line, or click anywhere that is not part of the line such that the focus moves away from the line, GL Lines validates the line. Finally, when you click the Save button on the toolbar, GL Lines validates the entire grid.
If the validator finds invalid data in a field, it determines the severity of the error and marks the fields with invalid data as "error" or "warning". A configuration helps the validator decide the severity of the invalid data.