Maybe standing up is also key in making your brain juices flow? Or the act of stepping away from your desk. (Assuming that's your setup)
I have a whiteboard that takes me 5 steps to reach and that definitely helps me
For me it's that act that helps, plus gathering stimuli you don't have at your desk which may bump you over a hurdle.
Whiteboards only tend to help me when I get to a problem I can't hold in short-term/working memory.
Maybe standing up is also key in making your brain juices flow? Or the act of stepping away from your desk. (Assuming that's your setup)
I have a whiteboard that takes me 5 steps to reach and that definitely helps me