# Headers > Headers break a category into labelled sections so you can jump to the right group of IDs at a glance. ## Headers group similar IDs into sections They all have: - An ID ending in 0, - A black symbol (■) to make them stand out, and - An emoji to make them memorable.[^1] For example, here is the first header ID from category `14` of the [Life Admin System](/las/). ## Headers are containers Don't save anything in these – they're just there to help you find your way. ## Headers are new-ish When designing the [Life Admin](/las/) and [Small Business Systems](/sbs/), we saw obvious patterns in the categories. IDs naturally 'clumped' together. So we added headers to make it even easier to jump to where you need to be. However, we don't necessarily recommend them if you're _designing your own system_. They restrict how you create IDs, so this may not be appropriate for what you're organising. It was easy for us to add headers because our systems are 'fixed/complete'. But your system probably won't be. Related forum post: [A discussion about headers](https://forum.johnnydecimal.com/t/headers/2642). [^1]: If your filesystem doesn't support the black square or emoji in folder names you'll need to omit these in your [settings](/support/settings/).