Hey ArielPezzat! hope the info above is helpful. I took this opportunity to add these hotkeys to the Static Mesh Editor UI page. So for future reference they can be found under the keyboard controls section here. They wont be there just yet but keep an eye out over the next few days as when we make our next documentation push to the live site they will be added in 
and you can always go back to them for reference. Have a great one !!