If you add a program like xmlformat
to the Helpers list, and then apply it to a selection
of text, a window pops up asking for the text to send
to the helper: you have to check the "Use current
selection" box and then click on the "Do it" button.
It would be a much faster operation if *no* window
would pop up when you are applying an helper to a
selection of text: since you've already selected text,
offering an "Use current selection" choice looks
redundant to me, you could safely infer that the helper
has to be applied to the selected text and avoid
popping up the window.