Project settings

1.The general tab:

• Change the name of the project if you prefer. 
• Target size: Recommend the 4.3GB if you are creating dvd.
• Custom size: you should select "Custom" item in the Target size option downlist, then will be able to input the custom size ( it is not suggested).
• Thread count: This is computer jargon, the larger the value, the shorter the time to create the dvd, but it will affect the performance of the computer. You could ignore this.
• Keep intermediate files: This option will keep the intermediate video, bat, txt, xml and audio files in the destination folder.

2. The Video and Audio tab: