To upload a custom template into ServiceM8:
Go to Settings
Click Document Templates
Select the template type you wish to upload from the list on the left (invoice/quote/etc)
On the right of the screen, you should see a button (Upload custom template)
Note: If you do not see this button, you will need to download one of the system templates using the link at the end of help (on the same page). Once you have done this, repeat the process and you will have access to the Upload Template button.
Browse your computer to select your custom template by clicking Select button
Click Attach to upload and confirm the new template
Note: When you click attach, your new template will immediately become your active template design (replacing your previous design), if you are updating a custom template we recommend you take a backup of the previous template before replacing it.