1. I clicked on the stop button.

2. I clicked the stop button.

Which one is correct? Are both OK? Which one is commonly used?

3 answers

Thank you for using the Jiskha Homework Help Forum. Both are gramatically correct. You could click the button directly as in number 2 or you could "click on it" as in number 1.
Thank you.
What about the following?

1. I pressed the stop button.
2. I pressed STOP.
(If there is STOP on the button.)
Both of those are also correct.