Basic editing using the native SVEditor / Eclipse commands is the same as you would use when editing any text in a Microsoft product. Select code using your mouse or keyboard, cut, copy and paste code using Ctrl+X, Ctrl+C, Ctrl+V. The tutorials cover this in extensive detail.
There are plugins available that allow SVEditor to behave more like GVIM or EMACS.
Please refer to the "Keyboard Shortcut Summary" for a useful list of shortcuts.