How do I add signature/logo to BUSY invoices?

To print signature and stamp image in invoice you need to have standard model of BUSY. You can follow below steps for configuration:
Step 1: Go to the Adminstration Tab, select Configuration option
Step 2: Click Feature/Option, select General feature
Step 3: Enable Maintain image & signature with user option 
Step 4: Define user signature image path in configuration tab and click OK button
Step 5: Save General feature window
Step 6: Click invoice/ Document printing option under configuration option 
Step 7: Select invoice type 
Step 8: Enable print user signature option
Step 9: Save printing configuration.
Please note, User signature Image should be named same as user name in BUSY and in JPGE format
To add LOGO: Step 1: Go to Administration and click on configuration tab.
Step 2: Click on ""Invoice / Document Printing"" and choose Standard.
Step 3: Choose the voucher type (such as sale, purchase, etc.) that you want to customize.
Step 4: For each field, select Y (yes) or N (no) depending on whether you want it to appear in the printout.
For Advanced format follow these steps:
Step 1: Go to Administration and click on configuration tab.
Step 2: Click on ""Invoice / Document Printing"" and choose Advanced.
Step 3: After selecting the voucher type that you want to customize (for example, sale or purchase, etc), you will see the name of your format below it.
Step 4: Clicking on the format name will allow you to customize different parts of the printing format, such as the header, body, & footer etc.