You can actually create various Keywords Lists in order to separate and structure your ASO work. This will allow you to have a better understanding of your app's visibility on specific keywords.
Simply click on the "+Add keywords list" button at the top of the Keyword Tool.
We recommend creating a global "broad" list that would take include ALL the keywords that could be potentially interesting for your app (including the ones that you are currently targeting).
You can then create sub-lists with all your brand-related keywords or keyphrases for example. You can also create a list with your latest release keywords, with your competitors' keywords, etc.
The whole Keyword Tool will display the data based on the Keywords list you've selected.