Next steps If you want, I can also classify nets (Power/Ground/Signal) and then we can move on to PCB layout prep (stackup/rules).

D’après la documentation Flux, le schéma ne permet pas d’imposer un pas de 2,54 mm:

“Flux’s schematic editor doesn’t use a traditional grid. Instead, components snap relative to each other for faster, cleaner placement. Just drag a component near another and alignment guides will appear—helping you line things up visually without worrying about grid spacing.” Source

Si tu veux quand même les aligner proprement, utilise l’alignement visuel et les guides lors du déplacement.