Change summary
When you change a page, there is a small box with the words "Change summary" under the main change-box. It looks like this:
Wikipedia:Change Summary Media
Brant Street in Downtown Burlington (2009)
The Brant Hotel in 1902. Located on the shore of Lake Ontario in Burlington, the hotel was erected on the former homestead of Joseph Brant, and was the largest resort in Canada. The hotel was expropriated and used as a military hospital in 1917, demolished and rebuilt in the 1930s, and then demolished in 1964.
Spencer Smith Park on Burlington's waterfront
Spencer's At The Waterfront
"Royal Canadian Naval Association Naval Memorial" (1995) by André Gauthier, Spencer Smith Park
Royal Botanical Gardens National Historic Site of Canada, 2019.
Burlington Mall (Now Burlington Centre)
City Hall, on Brant Street
Burlington's six municipal wards
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Change summary (Briefly describe the changes you have made here)
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Whatever you type into this box will show up on the New changes page, in the history of the page, and in the watchlists of users who are watching the page. You can write up to 200 characters in the Change summary box.
It is always good to write something in this box. This lets people know what you have changed. You can also say why you changed something. Some people use abbreviations (making long words or phrases shorter) in their change summary. There is a list of abbreviations used on the English Wikipedia's edit summary legend page.
When this box is left blank, the change summary sometimes gets filled in by itself, for example, it may say "Replaced content with (something)". This makes it very easy for others to see if a change is vandalism and change it back at once.