Quick access
If you find yourself switching constantly between two tools whenever you're drawing, then this feature was made just for you.
Whenever you open pixly you'll find your toolbar button alone.
But if you select a tool, that tool will be kept in memory, and when you pick another tool, that tool will start to show up right below the toolbar button:
tip
If you're not working out how to change the two tools in the quick access, try re-selecting one at a time the tools you want to get there.