UpCart's cart drawer consists of multiple modules.
Each module has it's own functionality, and all have their own settings as well.
When a module is enabled, you will see an open eye icon. When a module is disabled, you'll see a crossed our eye icon instead!
You can see a list of available modules by opening the Cart Editor tab in your UpCart.
If you want to know more about a specific module, check out the articles for each individual module!