Application scaling (zoom)
TagSpaces takes up a lot of pixels on my screen to display... a rather small amount of information. I know that's the way a lot of modern apps are going and I do find it aesthetically pleasing but when I go to use an application I need it to take up as little space as possible so I can fit more on my screen at once. The simplest method would probably be a button selection allowing "Tight", "Normal", and "Loose" similar to how Gmail has the Settings --> Display Density --> Comfortable/Cozy/Compact options. A slider would allow more options but I don't know that you really need to go that far.