Setting up images for an app you what to build

I was wondering if you had a video for a discussion on, how are you size and/or prepare images for an app that you are developing?
When I go through the lessons with the CW see all the images are already set to proper with in height and I was looking for how you set that up

You can try checking out some of our figma videos on youtube…
For image sizing like the x1 x2 x3 image you can use Prepo (free on the appstore) for that… You just feed it the original image which will be your x3 version and it will create a x2 x1 version automatically… It will also help you your icon sizing