Tap the Multi Point option and select a near and far focus point in your image. The yellow square focusing icon will turn green when focus has been achieved. Arsenal will control your lens to measure the distance of each focus point. It will then calculate the optimal focal position for maximum sharpness of those points and set the lens to that distance. The formula Arsenal uses is a modified version of the hyper-focal distance formula. Once you have set the focusing points, tap the return arrow in the upper left corner of the screen to return to the main screen. Now you are ready to shoot the Focus Stack. Tap the circular shutter button.Note: Depending on the distance between the focus points and the number of shots chosen, a message may appear recommending changing the number of shots. Dismiss the warning to continue or tap the icon with the stacking options to change the number of shots for the stack.View and Share your Focus StackWhen Arsenal is finished processing the stacked image, a thumbnail preview will appear in the lower right corner of the app. You can identify the completed stacked image by the Focus Stack icon that appears in the lower left corner of the thumbnail. Tap the thumbnail to see a larger version. Click the share button to save or share your completed stacked image. Please note: The completed stacked image that Arsenal creates is currently only available from the Arsenal Gallery in the app. It is saved as a temporary file. We recommend that you share or save the image from the Arsenal gallery after the stack has been completed.