Library Module – Grid – Press “Shift and Tab” at the same time in order to get a full screen grid. Then press “\” and then “T” to remove the filter bar and tool bar, then press “L” twice to black out the surrounding grey.
This makes it a whole lot easier for me to be able to evaluate my photos, to see them clearer, and I can still use the number keys to add colour or attribute ratings. Pressing “F” will then give me a full screen view of the photo that I have selected, to go back to grid just press “G”. To convert back to standard Library view its a simple as pressing the same buttons again.
Kelby, S; 2015; the Adobe Photoshop Lightroom CC book for digital photographers; New Riders; Pages 47-54