in the left corner of the screen?

English as a Second Language English Vocabulary, Grammar and Idioms
1

Hi,

Q1:“Click on the icon in/on/at the left corner of the screen.”

Q2: “I have logged in/on to my Facebook account.”

Which of the prepositions are correct in the contexts?

Thanks.

2

Q1. Use ‘in’ or ‘at’, but not ‘on’.

Q2. Use either.

3

Thanks!