Visit https://data.linz.govt.nz/ and select the Aerial Photography category (1) and then click the Add button for the Auckland 0.5m Rural Aerial Photos dataset (2).
Zoom in on your area of interest and then select the Crop function (1) and define an area on the map (2). The approximate file size of the images in the selected area is displayed top-left.
Select the Download button (1) and choose GIS NZGD2000 (EPSG 2193) export as JPEG format before clicking the Create Download button (2). When the download is created you can click on the link (3) to download it to your computer.
Unzip the downloaded file to a directory of your choice. Once the images are imported into Tumonz you can delete this folder since Tumonz saves a copy in the database.
In Tumonz select the My Photos tab (1), add a folder (2) to Mapped Images (or use an existing folder) and then select Add Orthophoto (3) from the context menu (right-click on the folder). Browse to the directory where the downloaded images were extracted, select all/some of the images (4) and wait for the images to be imported (5).
The new imbedded orthophoto(s) will show on the map, and you can control the display order and which photos should be visible in the treeview (1). If you need to change the order the photos appear (e.g. you need your lines to draw on top of the image) Ctrl + Left-click on the photo and choose Layer Properties (2). Tumonz will select the layer for you in the Current Map Layers tree.
The properties for the Mapped Photos layer (1) allow you to choose how My Photos are rendered e.g. level of transparency (2). You can also choose the rendering order of this layer by clicking on the Mapped Photos node and dragging it up/down in the list. NOTE – If you drag the layer to the bottom of the list it will draw last and obscure anything behind it (unless you make it transparent).