When typing an answer, in the lower left corner you can see a button "Infoga bild/foto".
Press that one and the you´ll get a "grid" , buttons saying "bläddra", press one and you´ll able to choose the pix from your computer or such.
After choosing you´ll be returned to "the grid" and to the right of the "bläddrabutton" you now see that your file is shown.
If you have more pix you want to upload, take the next "bläddra" below and repeat procedure.
When ready, go down left to button that says " Ladda upp".
Press that and wait. After a while (depends on size of pix and such) your pix will show and several lines show with text coloured blue.
Press the line saying "Infoga alla bilder samtidigt och stäng detta
fönster" then all your choosen pix will be inserted into your answer and the upload
window will be closed.
I hope this makes sense, otherwise
Good Luck