IS there a quick and easy way to do this? I read the options that were posted for Turtle to change the size of the layout. Is it the same for Tiger?
In a word, no. A Turtle album has a fixed width. A Tiger album is fully responsive - the layout is as wide as the viewport allows it to be.
There is a maximum width, however, specified under Tiger > Site > Design. That would have much the same effect as tinkering with the theme image width in Turtle, so that might do what you're after. The hero image in Tiger would still spread beyond that (if the viewport is wider than the maximum page width), but the thumbnails would not, nor would the controls that appear overlaid on the hero image.