# Recoll user manual
Examples of configuration adjustments

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#### Adding indexing support for a new file type

Let us now imagine that the above `.blob` files actually contain indexable text and that you know how to extract it with a command line program. Getting Recoll to index the files is easy. You need to perform the above alteration, and also to add data to the `mimeconf` file (typically in `~/.recoll/mimeconf`):

- Under the `[index]` section, add the following line (more about the `rclblob` indexing script later):

      application/x-blobapp = exec rclblob

- Under the `[icons]` section, you should choose an icon to be displayed for the files inside the result lists. Icons are normally 64x64 pixels PNG files which live in `/usr/share/recoll/images`.

- Under the `[categories]` section, you should add the MIME type where it makes sense (you can also create a category). Categories may be used for filtering in advanced search.

The `rclblob` handler should be an executable program or script which exists inside `/usr/share/recoll/filters`. It will be given a file name as argument and should output the text or html contents on the standard output.

The filter programming section describes in more detail how to write an input handler.

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