Can you adjust a slide duration without dragging the end point?

I am having "sort of" the same issue. Every time I add an object it auto selects to show until the end of the slide. I very rarely want this to happen because I bring graphics in and out of view. If I have 10 graphics added I have to go all the way to the end of the slide and move it back to the point I want it to stop. 

Is there a way to change the default setting so that object are NOT auto set to the end of the slide? I think this would help my frustration of not having an easy way to adjust the slide length.