[dancik68]

Hello i m working with WordPress 4.6.1 with Bigbang theme
my bbPress version is 2.5.10

The problem is in the tool bar: I see simultaneously both the visual bar that the textual, and the keys of the text toolbar are visible only if I get over them with the mouse

[Robin W]

it will be a theme css issue –

since Bigbang is a paid theme, suggest you post this issue to their support site