Logo in Print Invoice

Hi,

If you use the PDF invoice plugin, it has its own invoice layout file. You need to edit the file plugins/hikashop/attachinvoice/attachinvoice/invoice.php and do the same modification to it so that it will be taken into account when generating the PDF invoice file.

Hi,

Well, the simplest would be to use in your img tag an image with the correct size.
Otherwise, you can resize it with the height/width attributes of the img tag:
www.tagindex.net/html/img/img_width.html
If you want to align the image on the invoice page, you can use margin :
www.tagindex.net/css/img/margin.html
And for the placement, you need to move the img tag where you want it to be placed so it's hard to give you a precise answer here as I don't know where you want it, where you have it at the moment and where you placed it in the code so far.