This may be a dumb question but I'm not sure how to put the credits on an image I want to use (Its from Unsplash, I'm trying to make my own palette). Is there a program I can use to put the credits on the image or something else...?

Almost every art site has an option to add text. When you finish a piece, write every single source you use in the corner or something so that its visible, but not too large. Format it kinda like this: (username).DA or (username).Unsplash.

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Edit: it it's a pallete background you need to credit, put the username and site in your stable bio :)

Palettes can also have their crediting placed in the header image. Most artists will do this, now. :)

OK, thanks everyone!