The image upload window now has a "Gallery" tab — a library of free Pexels photos. No more hunting for a picture on another site, downloading it and uploading it back: pick a photo, crop it to the area you need, save.
The search fills itself in. Open the uploader from a course and its title is already in the search box; open it from a lesson and you get the lesson title. All that is left is to click a photo you like or reword the query.
Narrow the results with filters: by orientation (landscape, portrait, square), by dominant color and by query language — if the course targets another audience, search in their language. The orientation is preselected to match the area you are uploading the image into.
More about where images are used: How to add a cover to a course and Course program display options.