-When you create a drag selection and you modify a value in a plugin then everything in the selection gets modified the same. It use the previous keyframe and if there is no previous keyframe, then the default keyframe in your \texttt{\$HOME/.bcast5} definitions is used.
+\textit{Allow keyframe spanning} is enabled on the timeline by clicking on the icon that
+is on the right side of the \textit{Generate keyframes while tweaking}. With this enabled,
+when you create a drag selection and you modify a value in a plugin then everything in
+the selection gets modified the same. It uses the previous keyframe and if there is no
+previous keyframe, then the default keyframe in your \texttt{\$HOME/.bcast5} definitions
+is used.
+
+This is particularly useful in plugins that have the \textit{Drag} box enabled. You can
+select the area on the timeline where all of the keyframes exist with the drag enabled,
+turn on \textit{Allow keyframe spanning}, and then modify the menu for that plugin to turn
+off the drag.