Give this list a thorough read through, you may very well find some useful tools, or the answer to your question. Some cool tools I should mention here are:
Camera locations
These are useful for jumping around between different cameras, especially useful if you like using top down view for lighting.
Swing
VisualiserVisualizer
Chances are you've accidentally pressed this and a bunch of arcs have appeared onscreen. hitting this will turn them off 
The arc will change from green to red in the direction of swing.
Solo Event Type
Useful if you want to focus only on what a specific lighting group is doing without being distracted by other lights
Disable Objects
Some maps will have environment that clips through the lighting grid. This hotkey will make them go poof so you can see the grid nicely.
Lightshow Mode
Easy way to remove grids to preview your lights
Node Editor
The holy grail of Chroma 2.0. With this tool, you can dive into the JSON for each and every event, note, and object in the game, and edit any of the available parameters at the most precise level. Available parameters are listed on the Chroma GitHub Page
UI Mode
Chromapper has several UI modes, you may find these useful. The playing Mode will lock you into a position close to what you would experience in-game, so is good for previewing patterns.