Peter F. answered 11/17/22
Published Author; Kinder-College English Tutor w/ 18 Years' Experience
Hi Lincoln,
One other way to understand using "onto" versus "on to" in your writing is with the following examples:
"I logged on to my desktop."
"He hopped onto his skateboard."
In the first sentence "on to" (with the space in between the two words) indicates that you are going on to something (in this case, logging on to your computer desktop) electronically/virtually/mentally, but not physically or actually so to speak.
Whereas in the second sentence, "he" is hopping onto (no space in between the two separate words here; thereby making it a compound word) his skateboard which is a physical object. Upon hopping onto his skateboard, he is now officially physically on top of it.