The screen shots are too small an area but maybe try the T key for Tool Bar???
It the 'T' does not help:
For faster working hit 'G' for the grid view and 'E' for single image view.
I also see some '?' on your folders. This always rings some alarm bells.
Read here how to fix: https://www.lightroomqueen.com/lightroom-photos-missing-fix/
Here are bigger screen grabs.The bathroom shot is from my older Lightroom 5.7. I have the option above the thumbnails to view on the main screen. Using Lightroom CC (the Christmas room)I have managed to lose that option. Can anyone tell me how I get that back. I have a feeling it may be something to do with View Mode. but so far I haven't discovered what to do. Thanks in advance, Tony
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The different views are only available while in the Library. Your xmas screenshot shows you are in Develop module.
You seem to be hit by an acknowledged bug Adobe will fix, possibly in the next release (just a guess): Lightroom: Filmstrip is covering / overlapping filter- and breadcrumb bar | Photoshop Family Customer Community
Possible solutions: Lightroom: Filmstrip is covering / overlapping filter- and breadcrumb bar | Photoshop Family Customer CommunitySome say resetting preferences did help: Resetting Preferences in Lightroom CC/6