Welcome to the Simple Invoices wiki! If you want to edit a page - go for it - its a wiki
If you want to add a page - again, go for it!
To add a page the easiest option is to
click the 'Edit this page' button at the bottom of the page
under the Pages section add the name of your name in thwe following format [[wiki::name_of_your_page]].
Save the page
The link will now be in red (this means that the wiki page is available for use and is empty).
Click on the link and edit the page.
Once you save the new page the link will change from red to green
Done :)