I’ve inserted the code described here: https://codex.www.ads-software.com/Using_Images into my style.css so the alignment in the visual editor IS working.
The trouble is -sorry i don’t think I explained this well enough originally- the text isn’t showing up in the same position on when posted as it does in the visual editor.
For example: I have a large picture and one line of text that I want to sit to the right of the picture, about halfway down it. I format it the way I want in the visual editor, but in the actual post, the text is parallel to the top of the picture, not halfway down it. Is it possible to fix this so the page exactly reflects the formatting in the visual editor?