What does it mean when you read "edited by markS: fixed typo" at the end of a post :
Since we are not machines and some among us are not native English speakers, errors occur when writing/answering posts.
While I could leave things as they are and leave errors here and there, I prefer fixing them as I read, first it fits the eye better, second our search function finds more when things are written as they should.
The other thing I do when editing posts and granted the poster agrees, is uploading pictures stored here and there on the net on our server. In order to make them available on a long term basis.