Thank you for buying 3D Banner Slider. It contains two version: dark and like, and is vector-based. So it's highly configurable.
This manual teaches you how to adjust variable aspects of it. Hope you like this product and happy tweaking. :)
And my previous Blendy Navigation Menu Bar actually look goods with it. You might want to check it out here
Resizing the desk's top side vertically means to change its perspective, making it less realistic, I don't recommend doing so. But if you only want to adjust the desk front side's height, resize it vertically.
After that, align these layers to the front side.
To resize horizontally, select everything in the desk group, except for the hole group and the reflection layer, and you are good to go.
After that, you might also want to resize the banner horizontally
The wall is pattern is based, so you can resize it however you want. Just select the wall group and you are good to go.
The banner's image is a smart object, to change it, just double click on it and a new document will open with the image in it. Replace it with your own and save the document, then close it. The image is now replaced, together with its reflection.
These layers control the primary color. Note that to change the lights' color, you need to access to their inner glow style.