Here are some instructions about how to add an open circle on a photo:
Step 1
Tap “Edit” in upper right
Step 2
Tap pen point inside circle in upper right to open “Markup” screen
Step 3
With “Markup” screen open, tap the “+” plus sign in lower right to open 5 choices for editing and tap on the bottom option which is “Add Shape” to pop open shape choices. Choose round shape in upper right. This action causes a solid gray round shape to appear, which can be modified and moved.
Step 4
Change the solid gray round shape into an open red circle as follows:
Working at the bottom of the screen, tap the solid dark gray round shape (no number) on the lower left to open the “Colors” window. In the Colors window, tap the red line near the bottom to choose circle outline. Choose red color for circle, if you wish to replace the default black outline by tapping red color.
Step 5
Tap the solid gray circle at the bottom of the screen, which opens the “Colors” window. Near the bottom of the Colors window, slide the “OPACITY” button from right all the way to the left (0%), which creates an open circle. The bottom right 100% on the Markup screen does not need to be changed.
Step 6
Move the open red circle to wherever you want it to be on the photo.
Good luck!