I have downloaded car models where each model consists of multiple meshes including some modifiers. I would like to determine the dimension of the set of all these objects (window, bumper, trunk, ...). I know I can get the dimension of a single object in the transform panel. And I know I can apply all modifiers, join the objects and get the dimension of the resulting object and then undo the joining etc. But isn't there a more straight forward way?
In the end I would like to position the car model such that the center of it's bounding box coincides with the origin. Doing a plain Object > Transform > Geometry to Origin and then selecting "Bounds Center" usually destroys the model unless I apply modifiers and join the objects first.