How do I enable the previewpane. I applied the patch but I don't
have an option to enable it. Do I need to change the main.inc.php?

It's right there:

...

Index: config/main.inc.php.dist

--- config/main.inc.php.dist (revision 380) +++ config/main.inc.php.dist (working copy) @@ -228,5 +228,11 @@ // save compose message every 300 seconds (5min) $rcmail_config['draft_autosave'] = 300;

+// Enable preview pane +$rcmail_config['enable_preview'] = FALSE;

+// Default setting if preview pane is enabled +$rcmail_config['preview'] = FALSE;

// end of config file ?>

Robin