Hi krynne , this topic has been raised a number of times over several years. The adjustments that are possible with scaling are limited, and it seems unlikely that the desktop program can or will be enhanced.
If your file is online and you are able to use AccountRight in the browser, then you can use the normal browser controls to enlarge the display (Control and + to enlarge, Control and - to reduce). The browser layout is different, and there are some things that you cannot yet do in the browser (this help topic has more) .
app.myob.com will take you to a sign-in screen, or click the link in the command centre of the desktop program.