Taking note of is a phrase that means to pay attention to or to make a record of something. If you're looking for synonyms to use instead of this phrase, there are several options. For example, you could say that you're keeping track of something, taking notice of it, or being mindful of it. Alternatively, you could use phrases like observing, watching, or monitoring. Other synonyms might include catching, noting, registering, or remarking upon something. No matter which synonym you choose, the goal is to communicate that you're paying attention and taking action based on what you're seeing or hearing.