Board Thread:Support Requests - Designing Your Wiki/@comment-31045736-20170914045846/@comment-31045736-20170914072435

I mean like when I create a page on for example UNO. Now I have added the content like the full form is united nation organisation blah blah blah. Now I wanna upload a few pictures of it. Like its logo and flags of permanent members and when it was created  and who were the masterminds and stuff like that.. ok so i google the images and save them. when I try to upload them on the page I am unable to do so. it gives errors like .png files needed and things like that. When I finally try to meet the demands of the .png files and stuff I have harldy one or two pictures left to upload. This is my problem. And coding part also. I know its done on the source editor but what language is used and where to learn it?