In reference to the title of your post....
Right click any blank space on the taskbar and choose taskbar settings and from the resultant window choose "Use small taskbar buttons"
In reference to your question in the text of your post....
There are multiple methods you can use to download the "Spotlight" pictures.
There's a store app that you might find useful called "SpotBright" https://www.microsoft.com/en-us/store/p/spotbright/9nblggh5km22
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.