# 8 Debug mode

#### Overview

Debug mode may be used to diagnose performance problems with frontend
pages.

#### Configuration

Debug mode can be activated for individual users who belong to a user
group:

-   when configuring a [user
    group](/manual/config/users_and_usergroups/usergroup#configuration);
-   when viewing configured [user
    groups](//manual/web_interface/frontend_sections/administration/user_groups).

When *Debug mode* is enabled for a user group, its users will see a
*Debug* button in the lower right corner of the browser window:

![](../../../assets/en/manual/web_interface/debug_button.png)

Clicking on the *Debug* button opens a new window below the page
contents which contains the SQL statistics of the page, along with a
list of API calls and individual SQL statements:

![](../../../assets/en/manual/web_interface/debug_mode.png){width="600"}

In case of performance problems with the page, this window may be used
to search for the root cause of the problem.

::: notewarning
Enabled *Debug mode* negatively affects frontend
performance.
:::