Add file type to Intellij Find in Files Mask

Question

I'd like to use Intellij's "Find in Files" window to search through our Markdown-based documents. However the list of file types seems limited and doesn't include "*.md".

Find In File missing md extension

Is there a way to add a file extension to this window?

I've tried searching for an option in Settings, but no success so far.

Answer 1

The combobox is editable. You can type anything you want there.