diane wrote:

What is the Mark menu and explorer interface only brings up the host not my local directory so I can not transfer files this way.

What about using drag&drop as in Windows Explorer? If you do not like this, use Commander interface, which is intended to be controlled via keyboard.

diane wrote:

Ok I found Mark, but if there are multiple files and we want to select 2 out of three files how do we select only those 2 files?

If you are using Explorer interface, use the same way as you select multiple file in Windows Explorer. For example by holding down Shift or Ctrl keys while clicking mouse buttons.

Ok I found Mark, but if there are multiple files and we want to select 2 out of three files how do we select only those 2 files?

What is the Mark menu and Explorer interface only brings up the host not my local directory so I can not transfer files this way.

Sure, you can. See Mark menu.
See also https://winscp.net/eng/docs/ui_commander#selecting_files

How do I transfer more than one file at a time. Can I highlight multiple files to copy?