You can do it through the Instagram app. Just look for the 'Story' option and then there should be a 'Background' or 'Theme' setting to change it.
Changing the background in an Instagram story is easy. Open Instagram, start making a story. You'll find the background change option either on the screen when you start or in a menu. It might offer different presets or let you select from your gallery. Just pick the one you like!
You can do it through the Instagram app. Just go to the story creation section and look for the background option. There should be presets or the ability to upload your own image.
Changing the background on Instagram Stories is easy. Once you're in the story creation mode, search for the option that allows you to customize the background. It could be labeled differently depending on the app version, but it's typically there. You can select from a variety of preset backgrounds or upload your own to make it unique.
You can do it by opening the Instagram app, then when creating a story, look for the option to add a background. It's usually pretty straightforward.