What you could try:
Make the background/rectangular first and save it as PNG.
Open a new file (500x300 or whatever size, transparent) and just drag the background onto it. You can place the render after that any size you want. (Hope I made sense! o.o)
[MENTION=5445]nawi[/MENTION] ; Ok, lemme know if you need help ^^
And yea transparent. Cuz if you use the normal white, you end up with a white background even if you save it as PNG.
The empty parts (non filled parts with your signature) will stay transparent that way.
[240508] TVアニメ『狼と香辛料 MERCHANT MEETS THE WISE WOLF』オリジナルサウンドトラック Vol.1
[240619] TVアニメ『狼と香辛料 MERCHANT MEETS THE WISE WOLF』オリジナルサウンドトラック Vol.2
[240731] TVアニメ『狼と香辛料 MERCHANT MEETS THE WISE WOLF』オリジナルサウンドトラック Vol.3
Hi, I'd really appreciate it if you could reupload these files if you still have them. I'm on a bit of a hunt for the OST and couldn't find it anywhere else for now.