How to change a bmp file or pdf file in to jpg fle ??

you can open the bmp file in 'MS Paint' in Windows software (小畫家)
then save as jpg.
you can copy the pdf file in adobe reader
or copy it by press 'print screen' (Prt Scr) buttom,
then paste it into "MS Paint" and save as jpg.

圖片參考：http://polyart.com.hk/nop/n30.gif