Thank you very much. And I have some futher questions about design rules. In PCB Design Rules there are already many needed rules but in kicad there is one constraints called ‘‘Minimum connection width’’, which value should I set here ?
And also I didn’t find any rules about footprint reference, is there any constraints about the text (width, height, thickness …) ?
Last, there is some content belong to layer ‘’ F.Fab’', which shows the value of each components, should I do somthing about it ?