The Tools menu lists all the tools that are defined for the file type of the active file. Select one from the menu to run it.
Use the Configure Tools item to configure the tools to be added to the Tools menu. If you have not yet defined any tools then this is the only choice you can make in the Tools menu.
Tools can be configured to display their output in a message panel inside EditPad Pro. After running a tool you can use the Message Panel item in the Tools menu to show or hide this panel.