I'm currently participating on the design of a software application (not to be run on a browser) and after talking with the team that is handling the documentation about the software, a question arised.
The Header section will have icons so the user can navigate through all the sections of the application The Footer will have buttons with actions related with the section the user is currently seeing.
Now the question is: what to call to the middle section, with the "?"
The selection of term Header and Footer was based on the anatomy of a slide of a PowerPoint presentation but also to other examples like the areas of a letterhead. But the middle section is a mystery right now.
We thought of calling it "body" as a reference to websites but when mentioning it on the documentation, the common user might be confused of having a "body" on the application. We also thought of calling it "window" but according its definition here it doesn't overlap with the area of other windows and the user cannot move it around has a behavior he is used when interacting with windows on a desktop.
Does anyone have any suggestion or know any example that can help solve the name of the "?" section, or, if in your opinion, it is ok to use any of the terms I mentioned and why.