Info to edit and customize my Invoice template

Hello all, I was adding to my invoice 2 customs fields that I required, now the info is showing in the middle of the template but I need to show those fields at the begin of the line, what fields I should to add or modify the position in the customization of my invoice template?

Thank you all

Some fields can be drag/dropped on Settings > Invoice Design > Invoice/Product Fields

For more advanced changes you may need a custom design

Great I got it, and i did it for more advance changes where can I get some guide to learn how can I do it?