In order to maintain the consistent flow of conversation within threads, there is a 60 minute window during which members can edit their posts. This should be sufficient time to correct grammatical or spelling errors and also insert additional content if needed.
With a longer editing time, there is the potential that messages could be altered to such a degree that the topic flow within the thread would no longer make sense.
If you have a special need, please feel free to contact any moderator via PM.
I hope that answers your question!
Remember to always mark posts that resolved your issue with Accept as Solution.You can even mark multiple posts in a single thread. This will help other users find this information too! Use the Kudos Button to offer a thumbs-up for good content.