You can start the ScriptForm Designer from the first icon in the Tools toolbar...
You may also start ScriptForm Designer from the Tools menu by choosing it from the list of integrated tools...
When ScriptForm Designer (SFD) starts, it will automatically load any previously inserted form code to "open" the current script's form in the designer for editing. For this functionality to succeed, it is important that the script form code region not be edited directly. Any errors in loading the script are displayed in the Messages window.