Select existing (and generate custom) options in UI toolbox

Hello, is there a way to select the components of the toolbox in the Viewer UI? For instance, it is not necessarily important for my use case that it contains the pixel intensity distribution, nor that the cmap can be changed after initial rendering.
I'm not able to find anything relating to this here or in vtk-js. Any guidance for limiting the options and generating my own would be much appreciated.

Thanks.