My fan is convenient to carry around. See it can be closed when not in use. OR look it can be closed when not in use.
Which is correct?
The term see is usually used to mean a more passive action as something that can be accomplished automatically or even subconsciously:
I can see a mountain in the distance.
...while look is used for a more intentional and active effort:
I am looking for my car keys.
When used as an exclamation, these subtleties are less pronounced but still present:
See? There's a hare over there.
Suggests that the person has already passively seen the target in question and is therefore posed as a question, while:
Look! There's a hare over there.
...is requesting an active action, and therefore is formulated as a command.
Either can be used, but in this way:
"See? It can be closed when not in use."
OR
"Look! It can be closed when not in use."