The following series of pictures with comments are instructions for seeing Bismuth in an app called Filterra for iphone…
The following steps are how to see Bismuth using the Filterra app for Mobile( I used iphone 6s)…
The Curves steps involve pulling the thin white line with your finger down at one side( right), then gently pull the same line up at the left side…( it forms a parabola type shape)…
You repeat this same shape with your finger for each of the settings choices…
The cool thing about this process is you can get an X ray type look under the skin- you can see bones, tendons, all sorts of things- especially if you fiddle around with it a bit…
More complicated than other edits, but you can check for a broken bone if you have to!
Also shows how much pollution is in your body( Bismuth!)
edit instructions continue in following pictures, for Filterra app for iphone…
Done Bismuth checkup…Black is Bismuth in Filterra app for iphone…