[fxdigi-cash]

I believe it is simple, do either option:

1- Method A:

find out what id of each tool icon you want to hide using Chrome inspection element tool, then add a css style to your additional.css like this: #cke_6{display:none;}

so you will do that for each element you want to hide.

2- Method B (if you use ckeditor mod for MARCO):

you can go to Admin Cp/ settings/ User Registration Options/ select show standard editor toolbar.

if you are using a mod for the ckeditor such as, https://vborg.vbsupport.ru/showthread.php?t=264219

you can choose the options to show or hide whatever you like...

Good luck,