Settings - Keybinds

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 Visualizer

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.