How Do I Delete A Version Without Deleting The Master?

Congrats on your blog! There definitely is a lack of consciousness on Apple's side with regard to the ease of use of manuals which should - in our opinion - reflect the ease of use of their hard- and software (which is not the case). Thanks for every effort to change that! I spent a lot of time trying to understand the project/album/folder business. It may become a little easier with your help. The next thing (which I suppose is linked with the above subject) I will have to get my teeth in is "How do I delete a version and keep the master"? Until now I have not found a way to delete just this one file and be sure I have not done harm to something else.

A warning dialog is always presented when a master is about to be deleted. When no masters will be deleted, the delete proceeds without the warning and the operation can be undone with command Z.
delver1
When you select an image and delete it with Delete Version, that version will always be deleted. The master is only deleted if the last version is deleted, so if you see the dialog, that's the last version. File > Delete Master Image and All Versions always trashes the master and all the versions, and gives the same warning dialog.

Some confusion arises with images in albums. Remember that albums are just a different way of looking at the same images that are in projects. They are not themselves separate versions. Any change to an image in an album (including deleting) will affect the image in the project and all other representations of that image in other albums in exactly the same way. On the other hand, removing an image from an album will make it disappear without deleting it.

Note that the images you see are always versions, since you cannot see or manipulate the master directly. Each time a photo is added to Aperture, it stores the master and creates a version from it that contains no adjustments or modifications. There is nothing special about that particular version. The consequence of this is that if new versions are created either by duplicating existing versions or directly from the master, then none of them is the "master" version. You can delete versions in any order and only when the last version is deleted will the master be deleted.
The Bagelturf site welcomes Donations of any size