added Output window

Author: simongravelle

lammps-tutorials.tex

@@ -4395,14 +4395,22 @@ \subsection{Running LAMMPS}
 
 \subsection{Creating Snapshot Images}
 
-  To open it, use
-either \textit{Create Image} from the \textit{Run} menu, the
-\texttt{Ctrl-I} keyboard shortcut, or by clicking on the (right) palette
-button in the status bar. FIXME: add section
+Open the \guicmd{Image Viewer} using either the \guicmd{Create Image} option
+from the \guicmd{Run} menu, the \guicmd{Ctrl-I} keyboard shortcut,
+or click on the (right) palette button in the status bar. The image
+can be saved using the \guicmd{Save As...} option from the \guicmd{File} menu.
 
 \subsection{Output Window}
 
-FIXME: add section
+By default, when starting a run, the \guicmd{Output} window opens to display the screen
+output of the running LAMMPS calculation. The text in the Output window is
+read-only and cannot be modified, but keyboard shortcuts for selecting and
+copying all or part of the text can be used to transfer it to another program:
+The keyboard shortcut \guicmd{Ctrl-S} (or \guicmd{Command-S} on {macOS}) can
+be used to save the Output buffer to a file. Additionally, the \guicmd{Select All}
+and \guicmd{Copy} functions, along with a \guicmd{Save Log to File} option, are available
+through the context menu, which can be accessed by right-clicking within the text area of the
+\guicmd{Output} window.
 
 \subsection{Graphs Window}