Title is name of the bookmarklet that appears in the Bookmark bar in browser
Inject External Javascript can be used to inject javascripts like JQuery, MooTools etc. Enter the complete URL in the text box and click Inject External Javascript to inject it into the Bookmarket
Javascript Code is the code that is executed when Bookmarklet is clicked on Bookmark bar
Drag button is the button you click and hold to drag to your Bookmark Bar or Bookmarks in browser
Future Value is the value of present amount in future if the amount grows at given interest rate
To Edit just drag the Bookmarklet from bookmark bar to the Javascript Code section and the code will be copied to the textbox