+ \item[Layout Scale] allows for setting up scaling
+for your 4K monitors or any monitor where you would like the text and icons to be just a little bigger or a lot bigger. This scale setting is automatically saved across sessions.
+When first using Cinelerra, or if \textit{Layout Scale} has never been set, the initial value is 0.0.
+This means an automatic probe of the biggest monitor in use will be used for the setting. The advantage of this is that "new users" with a 4K monitor will not immediately be discouraged with too small text/icons.
+Leaving it at 0 instead of 1 is what most people will do and is probably preferable so that if you move to a different monitor with different dimensions/resolution, it will automatically probe.
+If a user wants to prevent the automatic scaling, \textit{Layout Scale} should be set to 1.0 to avoid the smaller characters that might result due to the probe of a non-1080p monitor.
+
+For testing or when you are using a different sized monitor and want to ensure the expected
+size for larger text/fonts before you start the application from a window, you can keyin:
+\begin{lstlisting}[language=bash,numbers=none]
+ BC_SCALE=2.0 {your Cinelerra path}/bin/cin
+\end{lstlisting}
+The scaling size would only be in effect for that run of Cinelerra. This is particularly
+useful in the case where the user makes a mistake in setting the \textit{Layout Scale} and Cinelerra becomes unusable.
+Then the environment variable, BC\_SCALE, can be used to overcome the bad setting so that you can get back into
+Cinelerra and fix the scaling parameter. For example, if you
+accidentally set \textit{Layout Scale} to 112.6, keyin the following
+and then when you get back into Cinelerra, fix \textit{Layout Scale} value in Preferences.
+\begin{lstlisting}[language=bash,numbers=none]
+ BC_SCALE=1.0 {your Cinelerra path}/bin/cin
+\end{lstlisting}
+