I have pic related circuit board, and I want to make a schematic

>>1230340
If it's a two sided board and you can remove all the components you can do it visually and with a continuity tester (multimeter ohms).

If you can't remove the components you have to understand what they do to probe the board.

>>1230340
bigclive takes good pictures of the sides and puts them side by side (flipping one over?) and draws from there. have datasheets ready as necessary.

you can easily edit and create a panorama image with irfanview

>>1230340 My way:
paintshop, paint.net, gimp, other good image editor.
pic of each side, flip one pic and change its colors with wand selects and bucket
clean up both pics so you are left with nothing but traces, pads and components (or replace components with numbers in circles,etc)
Then, use both pics as layers in one image, line them up and scale them.
You should now have Xray view. Get pen and paper and start drawing out numbered components and labeled stub traces individually for each component, then combine all those individual components with labeled traces into one pic. You should then be able to put the schematic into a program and clean it up