Sorting by selecting requires more user input but is more flexible than sorting by keyword. It allows you to search through a stack by using the "find" command in the message box, and then to select any cards you wish to have
copied to another stack. Here's the procedure:
1. Click the "Select" button. You will be prompted for a destination stack
name (either an existing stack or a new one). Two buttons will appear
below the "Select" button: "Copy" and "Done." Wait a second or so.
2. Browse the stack, using the message box to enter search strings.
(See "Searching" for more info). You may change the search string
as often as you like. Click the "Copy" button to mark a card for retrieval.