Hi, normal mode: runs your test or component with the execution arrow to the left of the keyword view or expert view, marking each step or statement as it is performed. If the test contains multiple actions, the tree in the keyword view item column expands to display the steps, and the expert view displays the script, of the currently running action. You must have microsoft script debugger installed to enable this mode. fast mode. Runs your test or component without the execution arrow to the left of the keyword view or expert view (for tests) and does not expand the item tree or display the script of each action as it runs. This option requires fewer system resources. Cheers sycho certified hp quicktest professional 9.2 software