All Collections come with a matching poster to make a clean, consistent set of collections in your library. These files
are stored in the [Kometa Images](https://github.com/Kometa-Team/Default-Images) Repository and each poster is downloaded straight to your Plex Collection when
A given default may have variables that are specific to it, and may also leverage a common set of shared template variables. These lists are shown on each default file's wiki page.
Each default file uses "keys" to refer to the collections and overlays that it creates, and you can use those keys to modify the behavior of individual collections or overlays created by the file.
For, example, the IMDB default creates three collections, each with their own "key":
| Collection | Key |
|:--------------------|:----------|
| `IMDb Popular` | `popular` |
| `IMDb Top 250` | `top` |
| `IMDb Lowest Rated` | `lowest` |
You use that key to customize the individual collection or overlay.
This example disables two keys, which will prevent those collections from being created. It also sets
the visibility of one of the keys [`top`] so that it is visible on the library tab, the server owner's homescreen and shared
user's homescreens (assuming the server owner and/or the shared users have the library pinned to their homescreen)
It also changes the resolution overlay to skip applying the overlay to 480p movies.
The template variables in this example happen to be all shared template variables.
```yaml
libraries:
Movies:
collection_files:
- default: imdb
template_variables:
use_popular: false # turn off the 'popular' key
use_lowest: false # turn off the 'lowest' key
visible_library_top: true # set visibilities for the 'top' key
visible_home_top: true
visible_shared_top: true
overlay_files:
- default: resolution
template_variables:
use_480p: false # turn off the '480p' key
```
## Customizing the set as a whole
In addition to the keys, each default can be customized with other template variables that are not key-specific.
This example uses a file-specific variable to change the order of all the IMDB chart collections to alphabetical by title and a shared variable to schedule these IMDB collections to be run only on Wednesdays.
On the `resolution` overlay, it uses a file-specific variable to disable all the "edition" overlays and a shared variable to align the overlay on the right side of the poster.
All of the default files are customized in this basic fashion.
**NOTE: this `template_variable` system is specific to the defaults. If and when you start creating your own [collection](../files/collections.md) or [overlay](../files/overlays.md) files, you cannot use this `template_variables` setup unless you specifically write your files to implement it.**
Each of these default files has a page on the wiki showing its keys, available `template_variables`, and default settings. For example, the default overlay `default: resolution` has a page [here](overlays/resolution.md).
The shared template variables can be reviewed here for [Collections](collection_variables.md) and [Overlays](overlay_variables.md). These are also linked from each default file's wiki page. Keep in mind that *most*, but not all default files have access to the shared variables. This will be noted on the individual files' page.