autocad problem

[Fabiopoi]

Good morning to all, I'm a new user so I would like to thank in advance whoever is available to help me.
I am an electrotechnical expert and I am involved in the design of electrical systems, the other day while working on a 2d floor plan I activated the 3d design mode and I couldn't turn it off anymore.
Could someone tell me how to do that? the version of autocad I use is 2015.
Sorry about the banality of my request, but I've never seen anything like that before, thank you.

 

[Zac69]

in the bottom bar there is a gear (passing from one work area to another) select > drawing and annotation

 

[Fabiopoi]

Thank you for your readiness, but I have already made this attempt and nothing changes, I always remain active on the three axes.

 

[Zac69]

try typing _cui. opens a window, select left at the top ampp > button dx > restores. and hopes not to have overwritten something unintentionally.

 

[Fabiopoi]

Thank you, later when I get to the studio, I'll do this and then I'll let you know.

 

[Tristan]

type at the prompt: _plan followed by double sending