Well, just "establish a standard format", e.g. decide on your show settings (Close show after last slide, ...), the action for a left mouse click (I always use Previous slide instead of the default Exit), if you want to show the Navigation bar, etc, etc. Then save this as a template (i.e. without any images) and give it a suitable name. And if you want to use this template for ALL your presentations just select your template (under Files | Templates | Manage templates and tick the box Default template for new projects: