You can either print selected transactions or all transactions of an account on your iOS device. Therefor please proceed as follows:

To print selected transactions do the following:

'Accounts' > 'Select Account' > 'Edit' above the transaction list' > 'Mark the desired transactions in the list of transactions' > 'Select the upload icon and PDF from the toolbar at the bottom. Then you can print the marked transactions.'

To print all sales of your account, do the following: 

'Accounts' > 'Select Account' > 'Edit' above the transaction list' > 'Select the upload icon and PDF from the toolbar at the bottom. Now you can print all transactions.'