You can also create a new component with a different name that has high-poly layer in the original form and low poly geometry in low poly layer. You can use the same name for replacing your current component with low poly and high poly geometry. Current components of your model get the required replacement with this feature. The high-poly count is used for the rendering that maintains the quality of the picture. Creating models and setting their views will preferably be done with the low poly version. You can use both low-poly and high-poly count in Proxy component as per your requirement. Saving time in rendering will let you focus on other designing detail of your SketchUp. Proxy component, in SketchUp term, is used to replace objects with high-poly counts so that you can avoid the delay to complete the rendering. Proxy components are such time-saver feature that allows you to work faster on your model and get a picture realistic rendering. SketchUp offers some easiest solutions that not only make your design better than others but also speed up your modeling process. Rendering is always a time-taking task, no matter what application you use.