Inkscape start up window tutorial
After installing Inkscape and start it, the software appears in a window like this
Even if you maximize it and close Inkscape then start it again it will appear like in the example above
If you want to start with maximized window (or any other size and position) every time you start Inkscape follow these steps:
Go to File / Inkscape preferences or use the keyboard shortcut Shift+Ctrl+P
Scroll down until you find Windows click once then on the right choose Remember and use last window's geometry. Before you close Inskape maximize the window.