This is up and running

Now I tried to setup the Branding for the context by entering the fields in the Branding Settings part. When starting the application, text entries, for example in the field servoy.branding.webstart.vendor:, are displayed. But I can't get images displayed, for example defined in servoy.branding.webstart.loadinglogo:
I have entered an absolute path for the images. Or has this to be a relative path? Do they have to be at a specific place? Best practice?
Regards,