To change the default sample types for an organisation navigate to Organisation, Sample Type Sharing in the System Admin panel. 

Select the organisation you want to change the sample templates for in the dropdown menu. Select the group the sample type template is in, then select the sample type you want to share and click Add as Organisation Template. To remove a template click on the bin on the right side of the screen. You can also remove the system templates to completely customize the available default sample type templates available for each group. 

When the Organisation Admin shares a sample type template from a group, other groups can add this template to their group. When the shared sample template is deleted in the original group it is no longer possible to add this sample template to a group. For an Organisation Admin it is possible to make a group and share the template from this group. Groups that use an organisation-wide shared template can edit these templates without changing the original template. 

Note that when one of the default sample types is added to a lab, a copy of the sample type template is created to allow additional customization within each individual group without affecting the sample type configuration in other groups. 

Note that changing the organisation default sample type template directly affects the default sample types that are available in each group when adding sample types.