This is the 1112th most frequent German word.
richten
"Richten" means "to direct," "to adjust," "to rectify," or "to judge," depending on the context.
In this sentence, 'richten' means 'to adjust' or 'to correct the position' of something, specified as the picture.
Ich muss das Bild neu richten, da es schief hängt.
I need to adjust the picture because it is hanging crooked.
Here, 'richten' is used in the sense of 'to direct something towards someone,' referring to the appeal that is directed to a group.
Er richtete einen Appell an die Community.
He directed an appeal to the community.
In this case, 'richten' is used in the legal context meaning 'to judge' or 'to make a verdict,' specifically about someone's innocence.