Sure! The process may seem a bit strange at first, but it'll feel like second nature after a little bit of practice.
First, select "Burst" from the top camera mode menu. This activates Burst Mode as the secondary function.
Next, press and hold anywhere on-screen where you'd like to focus. An animation will start indicating that it is trying to acquire focus. Once the indicator turns green, focus has been achieved.
Finally, while still pressing the screen, press and hold the camera button. Burst shot will then start.
To end, simply let go of the camera button. The process is easily do-able with one hand once you get the hang of it
This is also how the two other secondary modes (timer, timelapse) are activated. I did it this way so that users will always have access to two types of shooting modes without having to navigate the menus. In practice, people seem more likely to want burst as an "always-on" secondary mode as opposed to the other options, so in the next version, I will be changing things. Burst mode will now be the dedicated secondary function, and if one would want to access the timer or timelapse, one would simply select it from the menu and activate it by pressing the camera button, just like normal image capture.
I'm sorry for everyone who feels the current setup to be a bit confusing. I wanted to try something different, but it didn't work out how I had planned. These modes will be easier to understand and use in the coming update!