Sprites placed not appearing upon launching

Hi! For some reason, I was using a 2D Screen in my last edit (done weeks ago) wherein I had my background image in it (in .jpg) and back then it would appear upon launching. I corrected it according to our class tutorial (converted the BG into a .png sprite, added an animated sprite & put them under Camera) and deleted the 2D screen, but now it’s not appearing. I’m so confused right now and would appreciate immediate help. Thank you!

Managed to make them appear by customizing the following:

Rendering - Resolution Width, Height & Mode and Fill Mode
Camera - Ortho Height & Far Clip

I do wonder if there is a more exact setting (like inputting a certain width & height for Camera) because I only had to estimate the Ortho Height.