How can I perform multiple Gaussian fit on a "rebinned histogram"?

I created a histogram from .tex file and then rebinned the histogram from > Draw Panel > binning. My query is how can i perform mutiple gussian fitting of this “rebinned histogram” ? How should i proceed ? Detailed steps info is appreciated

Please read tips for efficient and successful posting and posting code

ROOT Version: 6.14
Platform: Ubuntu
Compiler: Not Provided

A rebinned histogram is like a normal one. Simply do a multiple fit.