It is a good idea to first understand how the Windows Automation Tool works by reading the introduction for that tool.
Writing WebDriver tests uses the same way of writing tests, that is, by selecting the element to click by dragging the mouse over the element and using the element selection dialog to define a good selector for that element.
We really recommend using two screens when writing WebDriver tests so that one screen can show SeqZap, and the other can show the browser.
IFrames require special handling when writing and running a test, instructions for how to do this is described in the section of the manual for the IFrames panel.