@mavica_again oh you use SciTE as well, nobody else i know uses it or seems to have even heard of it
~/.SciTEUser.properties
position.left=100
position.top=100
position.width=1000
position.height=600
position.maximize=1
there's config options for pretty much everything in the menus including having line numbers on by default, indentation settings, the status bar, even what commands are run when you hit F5/F7/etc
@mavica_again yes, you can create a config file to set the initial window size, or have it start fullscreen, i can look up the properties you would have to set