You can change the title, cover or description of a stack of cards whenever you want.
To choose a new cover image and change the title click on the three dots on the bottom right hand corner of the stack title card and choose Edit.
You'll then see a series of options to customise the cover of your stack.
You can choose to make it image only, text only, image and text and whether you'd like a deep or shallow image.
You can also edit the title of the stack which is displayed in Shooglebox navigation and when you're choosing a stack to copy or move cards in to.