What is Tracing?- Tracing is used to transfer an image into line work from a photo or artwork. You place your tracing paper over it and draw the lines that you see. So, Trace it & Sketch it.- Using this app you can learn drawing or tracing.- So how does it works?- Select an image from the gallery or capture an image with a camera then just apply the filter. After that, you will see that image on the camera screen with transparency & you have to put drawing paper or book anything on which you want to trace and draw. Your image will not appear on paper but a transparent image with camera so that you can trace it on paper.- Draw on paper by looking at the phone with a transparent image.- Select any image and convert it to a tracing image.READ_EXTERNAL_STORAGE - Show a list of images from the device and allow a user to select images for tracing and drawing.CAMERA - To Show trace image on camera and draw it on paper. also, it is used for capturing and drawing on paper.