How to select n files after the selected one in Finder window?

[martinewski]

I have a Finder window with one file selected. I need to add the n files to the selection.

Basically the same as clicking on a file and pressing Shift+down arrow n times. This is not doing it:

[JMichaelTX]

Instead of the Press and Hold and Type a Keystroke Actions that you have, use this one Action instead which includes the Modifier Key with the normal key:

[martinewski]

I didn't know the keystroke action accepted modifiers. Thanks!