Is it possible to display the category popup menu on sales invoices by default? We are finding that a lot of sales are going in as General Sales, as we do not always remember to click on the cog and then choose the correct category, and as a result our profit and loss report is not as accurate as we would like.
As @QFBeth mentioned, you can add a bit of code to your account if you have a Power User Subscription.
If you go to Account Settings >> Design Customisation >> Advanced HTML/CSS Customisation, and add the following to Global CSS, this will show the nominal code box on all invoices (new and old):