Dear Samsung Member,
Greetings from Samsung Customer Support!
To draw shapes on a picture you need to :: Go to Gallery>> pick the photo>>click on edit>>drawing>>pen>>choose the pen accordingly>>set the color>>and draw accordingly >>then apply>>then save.
Thank you for writing to Samsung.
Samsung Customer Support
The above answer isn't incorrect. That would be a hand drawn circle, OP wants shape tools with ability to change line coloring and fill. Like Paint on Windows. Samsung has a plethora of useful software bundled with their phones, some of which are quite Advanced, such as 3D scanning, etc... And their photo editing app is quite good. But what's continually surprised me is their lack of basic shapes, again, like Paint on Windows. Why they still haven't added this is beyond me.