How do I delete a section of a wall

[kajus24]

Hi everyone,
I am a newbie and have a question for the pros:

I am creating a 2D plan for a flat remodel to give to my contractor:

I created 3 adjacent rooms (no external wall yet).
A section of a wall that is common to two rooms will be removed in order to create a larger room (a kitchen). The room will no longer be a rectangular shape.
Now, how do I 'delete' the section of the wall in order to open up the two rooms?
Does the SH3D software allow to delete sections of a room or walls?

If not, how would you perform this operation in 2D?
Thanks! in advance

[hansmex]

Split the wall in two or three parts, then delete one part and resize the remaining part (s).

H