Importing Photoshop Backgrounds into Toon Boom Harmony

Hello,

I have a question regarding creating Photoshop backgrounds and importing them into Harmony.

I plan on making an animated cartoon with Toon Boom with backgrounds created from Photoshop. I am considering using the backgrounds I’ve made with Photoshop and importing the backgrounds from Photoshop into Toon Boom Harmony.

Should I create my Photoshop backgrounds in HDTV 1080p, NTSC or 4K? I feel like this would help me when choosing the format to draw the backgrounds in and then importing them into Toon Boom Harmony. Also, what format/canvas size should I use?

Right now, I have it under HDTV 1080p at 1920x1080 @ 300 resolution. See attached.

Thank you for reading!
Kenny M.