this is from memory:

the program background is not responsive - that is it will only show a full 1920 by 1080 if it is maximised on a screen with that aspect ratio, otherwise it will be truncated - ie looks like it has been cropped, but if you export at the correct size it should be ok

to move the text you have to manipulate the spacing

put your cursor at the start of a line and press spacebar a few times and watch what happens to that line - repeat for other lines, adjust the font size, spacing and tracking as necessary

the manipulation of the background and the text are completely separate - the positioning of the text is reponsive and will always be relative to the program window; but not the background which is static and will fit to the export size

it is a very long time since I used this program which is now long in the tooth; there may be better ways, but hopefuilly this will point you in the right direction, and hopefully I am remembering correctly