Hello,
Beginning in PCB design, I have a rather basic question. What step do we have in order to design a PCB (supposing the schematic is already done) ?
In the course Allegro PCB Editor Basic Techniques v17.4-2019QIR2 (Online), they first create a "mechanical symbol" for the board (outline.dra) and then they create a board (master.brd) in which they place the outline.dra mechanical symbol.
In another tutorial that I saw on Youtube, they directly create the .brd file and draw the outline of the board directly in it.
I assume the first way (mechanical symbol --> board) is the correct one but I don't know why. What is the concrete difference between these two methods ?