make maximum window size default

When I open a Writer Document in Mac OS 10.10.2, the window size is always small and I have to drag it larger to maximise it. Can I set up preferences to maximise the window size?

I don’t know.

When I open LibreOffice documents, especially Calc, sometimes also Draw or Writer, the window resizes to take up almost my entire screen, and I have to drag it smaller. Can I set up preferences the other way?

I have no idea how we end up with opposite problems here.