'onto' vs 'on to'. What is the difference?
Onto is a preposition meaning 'on top of,' 'to a position on,' or 'upon.'
- Kaley climbed onto the tree limb, dangling precariously over the stream.
It can also mean 'fully aware of,' or 'informed about.'
- George realized Amelia was onto the surprise party he was planning.
Use on to as separate words when on is part of the verb.
Alesha caught on to his scheme from the start.
I'm going to log on to the program tonight.