Command to Take Picture Gazebo Simulated Survey Camera

Hello, I am new to PX4 and Gazebo. But, I have the plane_cam running in Gazebo by running

make px4_sitl_default gazebo_plane_cam

Per the following instructrions:

I also see the pictures take are stored in PX4-Autopilot/build/px4_sitle_default/tmp/frames/DSC_n_.jpg

From the px4 console, I can run a camera_trigger test and it seems to succeed. I can also take a picture from the gazebo UI and it stores in .gazebo/pictures

But, from the px4 console, how do I instruct the plane_cam to take a picture?