1. Here's how
MyLumion is a service which can only provide for display of the 360 panoramic images in a PC browser or phone via an internet connection. There is no ability provided by MyLumion itself to provide for an offline copy.
However, what does seem possible is to make use of the offline features of web browsers to view cached data when not connected to the internet.
The Offline mode exists for Google Chrome, Microsoft Internet Explorer, Microsoft Edge and Firefox. Microsoft Internet Explorer and Firefox provide a direct offline menu to access.
1.1: If you have a Clear Cache setting in your browser that automatically clears all local copies of data when closing your browser, then you will need to disable or set the browser to not clear the cache.
1.2: For Google Chrome, you need to set a flag that enables using a saved local cached copy of the files. Enter the following text in the address bar in Chrome and turn the highlighted Enable: Primary setting on:
1.3: While online, please visit the MyLumion page for the project.
1.4: Click on each Panorama Location so that the MyLumion server downloads the Panorama image content for each location to your browser.
1.5: Make sure you have bookmarked the MyLumion Panorama project address so that you can easily locate it after disconnecting your internet connection.
1.5: Test that you can then access that in an Offline mode.
1.6: Go back online to continue other tasks.
1.7: When travelling/offline, then browse to the desired Panorama page and you should see a button (Show Saved Page). Click on that and it will then retrieve the local cached content and display the page and MyLumion Panorama.