All the pages of Pictosaic are described here

My picture: (jpg, png or gif file)
Composition type:	I select one or more topics below. I select all the topics All the cell images represents only my original picture
Topic selection:	Animals Cat Dog Bird	Nature Flower Cactus	Emotional I love you Birthday Mother Day Smiley	Transport Car Bike Truck Train
Optional insertion of my own photos:	I insert my photo collection into the mosaic
Number of cell images:	2400 (ex: 60 x 40 photos): For screen or paper size up to letter format. The mosaic has a low resolution 5400 (ex: 90 x 60 photos): For poster or zooming. The mosaic keeps a good resolution
Merge with my original image:	No merge (my original image does not appear in transparency). Low merge (my image appears in low transparency) High merge (my image and tiles have the same transparency level). Centred merge (my image has a high transparency level in the middle and decreases to the borders).
Picture into the mosaic:	My picture will appear somewhere into the mosaic (but where???)