> For the complete documentation index, see [llms.txt](https://help.visibrain.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.visibrain.com/platform-guide/filters-subtopics-and-filter-library/create-subtopics.md).
# Create Subtopics
*Subtopics* allow you to save a specific *Topic* + *filter* combination for easy access: \
on the homepage, when creating a report, setting up an alert, or within a Smartboard.
Thanks to *Subtopics*, you can create an initial large *Topic*, and then refine it further. \
You can even create multiple levels of Subtopic to organize your monitoring however you wish.
## Create a Subtopic
Once satisfied with your applied filter, click on the "floppy disk" icon and "*Save as new Subtopic*" to create a new *Subtopic.*
Name your **Subtopic** and validate :
## Modify a *Subtopic*
To modify a *Subtopic*, click on Edit on your Homepage or on your Explore Page :
## Overwrite a Subtopic
To overwrite a Subtopic click on Reveal Subtopic Filter :
Once you're satisfied with your updated filter, you can choose to save it as a new Subtopic or overwrite a pre-existing one :
## Add to a pre-existing Subtopic
You can add new filtering options to a pre-existing and applied filter, this is particularly useful when adding exclusions to your Subtopic.
Use the "*Add to current Subtopic*" option.
## Delete a Subtopic
Click on Delete on your Homepage or on your Explore page :