Raymarine e7 User Reference page 264

Move your finger up and down the screen to tilt the camera
up or down.
Move your finger left and right on the screen to rotate the
camera left or right (panning).
Note: You cannot zoom the image using the touchscreen. You
must use the multifunction display's rotary control, or the thermal
camera's optional Joystick Control Unit (JCU).
In some circumstances it may be better to use just the UniControl's
rotary and joystick controls to manipulate the thermal camera view.
For example, this method is ideal for finer control over the camera
and is particularly useful in rough sea conditions.
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UniControl joystick — is used for rotating the camera left or
right (panning), or tilting the camera up or down.
UniControl rotary — is used to zoom in and out.
Thermal camera home position
The home position is a preset position for the camera.
The home position usually defines a useful reference point — for
example, straight ahead and level with the horizon. You can set the
home position as required and to return the camera to the home
position at any time.
The home icon appears on-screen momentarily when the
camera returns to the home position. The icon flashes when a
new home position is set.
Resetting the thermal camera to the home position
In the thermal camera application:
1. Select Menu.
2. Select Camera Home.
The camera returns to its currently defined home position, and
the "Home" icon appears on-screen momentarily.
Setting the thermal camera home position
With the thermal camera application displayed:
1. Use the joystick or touchscreen to move the camera to the
desired position.
e7 / e7D — User reference