my english is very bad... so... i expect you are using a french version.
do you want add a image with a layer ?
first you open a image. it's the background.
after Menu "Edition/Coller depuis"... or Edit/Paste from file... in english...
.... in the dialog-box find the image wich you need... ok
... the new image appears over the background.
you places this image where you want with the mouse, then mouse right click above and choose "Paste as new layer" (in french "Coller comme nouveau calque"). You can also shrink, rotate.. before paste. If you don't want a layer, choose only "Paste" ("Coller")
....
after, if you want, you can choose the layer's transparency... select the layer with the mouse, clic on its bar, (select=icon surrounded by red ), clic on its name and choose the opacity.
here a tutorial (in french, sorry) for the beginners...
http://fdom.free.fr/pixia/here a tutorial for the layers and transparency (in french also)...
http://pixia.free.fr/index-.php choose the zip-file "Calques, masques et transparences.."
here, the pixia english... with the help file in english
http://www.ne.jp/asahi/mighty/knight/download.htmyou have also many tutorials with youtube
je modère, alors, svp, pas de politique, pas de guerre windows/mac/linux, pas d'insultes, pas de fichiers illégaux, pas de sms