Maybe a stupid/simple question: So I am viewing a project in fullscreen, and I want to flag certain interesting photos so I can look at them later for editing or export. How do I do this?

If keywords are sufficient for your need to mark images, then they can be added easily in full screen mode. The method I am about to describe works outside of full screen mode too. It is just not obvious that it does work in full screen mode because the controls are hidden.

Let's assume you want to mark the images for adjustment and so will use a keyword Action > Adjust to mark them. Make sure the viewer is visible (press V if it is not), bring up the Keyword Controls with shift D:

and select Edit Buttons...

Add the keyword Adjust in a convenient place

And add that keyword to one of the button sets. I am adding it to my Action button set:

Now click OK to close the dialog (maybe locking the keywords) and look at the Keyword Controls bottom right. Scroll through the sets with the period and comma keys until you get to the set with the Adjust keyword:

In this example it is attached to the 6 key. Option 6 adds it and shift option 6 removes it.

When you view your images full screen, make sure you have the correct button set displayed, and then as you navigate through the images press option 6 to mark for adjusting. If you have metadata display turned off you will see no change to the image. All selected images displayed in full screen will have the keyword added unless Primary Only (S key) is turned on. You can of course use multiple keywords set up for different keys and tag with any number of them.

It is possible to combine this technique with a smart album and negative filtering to make all marked images vanish from the current album as they are marked. This is handy when you are trying to reduce a set of images down to a predefined number.

Tags: Q&A, Aperture, Full Screen, Keywords