See https://wiki.logos.com/Night_Mode for ways to invert the colors on your PC/Mac, including Logos 6.
An error occurred while saving the commentmikehenrysr commented
This would be great. My single greatest frustration with Logos is the incomplete notes feature.
The LDLS3 Topic Browser has been replaced by the Factbook and Topic Guide.
An improved version of LDLS3 Fuzzy Search for Bibles is available as Fuzzy Bible Search (in Everything Search in Logos Now): https://community.logos.com/forums/t/132569.aspx