Hi there!
I didn't do VCE (I did HSC!), but the way I would set my notes and how much I wrote my notes would be based on the verbs given on each dot points. I don't know if this is similar to HSC, but with each dot point, there was always a verb at the start. For example, the HSC Biology dot points for module 6 would be "Evaluate the effects of mutation, gene flow and genetic drift on the gene pool of populations". In this dot point, the verb is evaluate, which means "Make a judgement based on criteria; determine the value of". In other words, evaluate is to explain both the positive and the negative aspects of the subject, and give an overall judgement. Because 'evaluate' is a high order term (high order terms can include assess, synthesise, examine etc), this means you would need more extensive notes because questions revolving around this dot point, could have a higher mark allocation (5-8 markers). In contrast, low order terms such as outline, identify and describe would not require as much notes written since a basic understanding is required and questions revolving around these low order terms could be 2-4 markers.
To add on what the others say, do as many past paper questions as possible consistently. Even if you're learning the start of the module..do questions! By keeping this as a habit, you are able to consistently practice your own application of your own knowledge and what you can recall. Because you are also marking your practice questions, you are able to seeing what you should or shouldn't add for later times when you encounter similar questions or even do the same question. As a result, you are able to write concise and logical response whilst also maximising your marks. You familiarise your understanding of the topic you are testing, thus, you begin to shorten and summarise your own notes! And, as you near your own VCE Exams, you will have limited amount of pages to revise over because you have done past paper questions consistently throughout the year
Hope this helps!