Did you know that you can review your changes visually?
When you are finished editing the page, type your edit summary and then choose "Review your changes".
In visual mode, you will see additions, removals, new links, and formatting highlighted. Other changes, such as changing the size of an image, are described in notes on the side.
Click the toggle button to switch between visual and wikitext diffs.
The wikitext diff is the same diff tool that is used in the wikitext editors and in the page history.
You can read and help translate the user guide, which has more information about how to use the visual editor.