I have a custom action button that initiates a manual workflow within a list. When this button is clicked, a default initilization page with the title "Start Workflow" appears with a "Start" and "Cancel" button embedded on it. What I'm trying to do is to apply some customization to this page's design (say adding a couple of sentences and changing the buttons' text)??
I have been looking inside designer but was not able to find the corresponding aspx file for the page; how would I go about changing it?