'Processing'-'BMPs->GIFs': (ONLY 8bpp mode) call of file manager for selection of folder with BMP-frames, which will be converted to GIF-frames. If FC not equal to BC - then gifs will be saved without transparency. And if FC = BC - then gifs will be saved with FC transparent color. Just before calling BMPs->GIFs select as FC and BC your future transparent color (you can get it by pressing triple JoyDown from any of your BMP pictures, IMPORTANT: all BMPs must have IDENTICAL palette for correct saving with FC-transparency) and in result in GIFs all pixels with FC(BC) will be transparent.