Edit the manifest file in the creator

[bodymindpower (Anke)]

To edit the Manifest you have to decompile your APK.

See e.g. here:

I want to edit android manifest

What exactly do you want to achieve? When does “i am creating a launcher” mean? To customize the Manifest, see eg here:

You can change a lot in the Manifest, but for example:
If you change your packageName in the Manifest, the app will no longer work. For this, the entire APK structure (paths etc.) must be changed.

See e.g. here: App Inventor Tutorials and Examples: Package name | Pura Vida Apps