# Recoll user manual
Index configuration

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### The index configuration GUI

Most parameters for a given index configuration can be set from a recoll GUI running on this configuration (either as default, or by setting `RECOLL_CONFDIR` or the `-c` option.)

The interface is started from the Preferences → Index Configuration menu entry. It is divided in four tabs, Global parameters, Local parameters, Web history (which is explained in the next section) and Search parameters.

The Global parameters tab allows setting global variables, like the lists of top directories, skipped paths, or stemming languages.

The Local parameters tab allows setting variables that can be redefined for subdirectories. This second tab has an initially empty list of customisation directories, to which you can add. The variables are then set for the currently selected directory (or at the top level if the empty line is selected).

The Search parameters section defines parameters which are used at query time, but are global to an index and affect all search tools, not only the GUI.

The meaning for most entries in the interface is self-evident and documented by a `ToolTip` popup on the text label. For more detail, you will need to refer to the configuration section of this guide.

The configuration tool normally respects the comments and most of the formatting inside the configuration file, so that it is quite possible to use it on hand-edited files, which you might nevertheless want to backup first...

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