??? Automatic stop at the end of the project

I’m new with Cubase Elements 10 … I created a new project … I make it play but the play mode doesn’t stop at the end of the project even if I put a marker …
The F2 command is really too large for the screen …
There is noise in my sound system when I plug Montage connect …
Thanks

You can find that in the menu Transport > Play Project Range. Either by making a selection or use a marker.