Very much so. I-PSD yi-Photoshop eqhelekileyo — amanqanaba, izigqubuthelo, amanqanaba olungiso kunye neendlela zokudibanisa zihlala ziphila kwaye zihleliwe, ezingakhokelelanga kwifomati yomfanekiso othe tyaba. That determines both the headroom available and whether the saving costs you anything in fidelity.
Yes — amaleko, izigqubuthelo namaleko olungiso zizinto eziphilayo kunokuba zii-pixels, ngoko ke isixhobo siyazigcina okanye sizidibanisa phantsi - akukho kukhethwa kuphakathi. It is worth knowing before you overwrite an original you might need again.
Ingaba i Cima PSD iya kunyusa ubunjani be PSD files yam?