Is it possible to define a hotkey e.g. ctrl+F9 that copies the left folder (dual view) to the right?
TX
KEJ
Yup, the command is:
Go CURRENT OPENINDUAL
You can create a standalone hotkey for that, or you can create a toolbar button which runs the command and also has a hotkey. It's up to you. If you're not sure how to do either have a look at the Toolbar editing tutorial to learn the basics, then look at the Keys tab of the Customize dialog (via the Settings menu) if you want a standalone hotkey.
Thanks for the reply. I tried to create a key in customize/keys and used the command "copy". And it just works...
I love it when a program does what I want 
Tx
KEJ
Oh, you wanted to copy the selected files from left to right? I thought you wanted to show the same folder in the right.
Glad it's doing what you want, anyway.
By the way, you could have also edited the Copy button on your toolbar to give it a hotkey. Same result but now the "Copy" command is only in one place which is a bit tidier, although it doesn't make a huge difference.