\label{Domain_Configuration_Course_Defaults}
Starting with LON-CAPA 2.10, a Domain Coordinator can configure default 
settings for courses in the domain. Defaults are of two types:
\begin{itemize}
\item \textbf{Defaults that can be overridden in an individual course by a Course Coordinator} 

Currently, there are five domain defaults of this type (which can be overridden
using Settings $>$ Course Settings $>$ Display with ``Display of resources'' checked).

\begin{itemize}
\item Default method to display mathematics expressions included between $<$m$>$ and $<$/m$>$ tags.

Starting with LON-CAPA 2.11.3 the default renderer used to display math can be set to one of: 
\textit{MathJax}, \textit{Convert to Images (mimetex)}, or \textit{TeX to HTML (tth)}.
The domain default in effect for a user will be for the domain of the user's current role.
However, if a user has selected a renderer from the \textit{Math display settings} in 
User Preferences that will take precedence over the domain default.
Furthermore, if the course setting: \textit{Force use of a specific math rendering engine}
has been set, that will take precedence (in course context) over both the user preference 
and the domain default.  If no default renderer has been set, MathJax is used in 
LON-CAPA 2.12 and later, whereas TeX to HTML (tth) is used in LON-CAPA 2.11 and earlier.
  
\item Student formula entry uses inline preview, not DragMath pop-up

For problems that require a formula input via a textbox, the default is to
show the math expression in a previewer below the textbox, as the student types.
The alternative is to use the older (Java-based) DragMath pop-up which allows 
the student to compose the expression in a WYSIWYG-style editor in a pop-up window
and then save it to the textbox in the main window using a ``Save and Close'' button.

\item Molecule editor uses JSME (HTML5) in place of JME (Java)

For problems that require the student to ``draw'' an organic structure using a
molecule editor, the default is to use the HTML5 version (JSME).  The alternative
is to use the older (Java-based) JME editor.

\item Chemical reaction response uses inline previewer in place of pop-up

For problems that require the student to submit a chemical reaction, the default is to
use an inline previewer which displays preview of the reaction with appropriately
formatted stoichiometry and subscripts and superscripts as the answer is typed in
a standard textbox.  The alternative is to use the older pop-up window to type the
answer and then to use separate buttons to preview a formatted version, and to save it
to the main window.

\item Course requesters who may clone a course (besides course's owner and coordinators)

This can be set to no additional requesters, or to any course requester in the domain, or
if categories have been defined in the domain for institutional codes for official courses
(in localenroll::instcode\_defaults), to categories which must match in new and cloned 
courses (e.g., department and number).

\end{itemize}

\item \textbf{Defaults that can be overridden in an individual course by a Domain
Coordinator}

Currently, there are five domain defaults of this type (which can be overridden
via the ``View or modify a course or community'' interface). 

\begin{itemize}
\item responder count - number of responses needed before submissions made to 
anonymous surveys (with no identifying information) are viewable by Course personnel.
\item default course quotas - domain default for quotas (MB) for official, unofficial,
community, and textbook course types for content uploaded directly to the course.
\item default course credits - whether credits may be specified for courses (Yes/No),
 if yes: default values for number of credits for official, unofficial and textbook courses.
\item submit button behavior post-submission

The default is for the ``Submit Answer'' button in the current page to be disabled for 60s following
answer submission.  After processing a student's answer a new page is displayed. The setting 
to disable a  button, (with or without a timeout), applies to the button in the old page in
the time period before the new page is loaded by the browser.

\item lifetime of temporary tables (course's homeserver)

The default lifetime (since last update) for ``temporary'' MySQL tables 
containing student performance data is 172800s (i.e., 2 days). A different default
lifetime can be set by course type, which will apply to MySQL tables on the course's 
homeserver only.

A reason to do this might be where a domain has created a custom script to export
a course's grade data, by running SQL queries against the temporary tables.

Note: student performance data are stored permanently in GDBM files; the temporary MySQL
tables are simply used to speed up display when a Course Coordinator uses the 
Assessment Chart or Statistics functions in a course.

\end{itemize}

\end{itemize}

