Simple! Just click the mouse twice! Ok, we are just kidding.
1. Select pictures. Click the "Add Pic" button or the "Add Dir", browse and select the desired pictures.
2. Click the "Build" button at the bottom of the application window.
That's it! A gallery will be created in the default output folder with the default settings.
You probably noticed that there were actually three clicks in the above-mentioned procedure ("Add", "Ok", "Build"). We just noticed that too. But it's too late to change our application or the name of this page. Three clicks is also a good result, isn't it? Or you can hit the "Enter" key instead of clicking the "Ok" button in the "Add files" dialog. Please do that to justify the title of this page.