One of the slightly annoying things about Aperture is the limitations placed on you when creating a book. Whilst it is incredibly flexible in lots of ways, certainly much more than iPhoto, there are some things I really want to be able to alter.
One of these is the colour scheme in the ‘Special Occasions’ Aperture Theme. By default, you get a pale blue colour for any panel not holding an image. It looks quite smart, and the ‘helvetica Neue Ultra Light font is smart too… but I often find I want to change it. The trouble is, Aperture doesn’t let you do so easily.
Of course, if you fancy digging around in the files for the app then almost anything is possible! It’s not exactly easy, and you should always make a copy of the theme and work on that rather than jigger around with a perfectly good one and break it, but all you need is an eye for colour (and design?) and a decent text editor. I use BBEdit, but you can do equally well with the free Text Edit that comes with your Mac.
First things first – what I am about to do is not recommended, and I take no responsibility for how your system runs after you try it 
Seriously though, work on a back up copy of the theme, and you can always delete it later. Also, it is likely that even if you do change things now, any update to the software could well over write your hard work… this tutorial works with v1.5 of Aperture. Apple have only this week released v2 as an update and it boasts new book themes and capabilities. It seems like a good time for me to play with the current version I have got installed, then!
You find the book themes by control-clicking on the aperture application icon (in your Applications folder) and selecting ‘Show Package Contents’ . Navigate to ‘Contents/Resources’ and scroll down to the folder ‘Book Themes’. It’s probably quicker to type ‘book’ as you won’t then have to scroll – the finder will jump to the items with those letters at the start. You’ll then see the themes nicely lined up. Select the one you want to alter and make a copy of it (by holding down ‘Alt’ and dragging the folder to the bottom of the list). You can see that I have copied my ‘Special Occasions’ theme and renamed it ‘Alternate Occasions’. A word of caution – simply renaming the folder won’t give you a new theme name inside Aperture. It *will* list it alphabetically in the theme browser, but the theme list will show two copies of ‘Special Occasion’. We’ll get round to renaming things a bit later on.
Now you have the copy, open the folder and have a look. In my case, the first folder is called ‘Hardcover’ and everything else is in that. The things you may want to change are likely to be the fonts you can use and the colour of the bocks. For the fonts, look for the ‘TextStyles.plist’ file and open it in your text editor. What you’ll see is a series of XML statements which define the fonts in use, the size of them and the colour/style.
Changing Font Colours
I would leave the ‘Title’ key values alone. these are referenced in lots of other places and changing them here means an awful lot of editing elsewhere. You can also easily change the font in Aperture without needing to edit things here, but these keys control the default settings for the book, so you might want to tinker a little. Changing the default font is simply a matter of changing the key by typing in the name of the font you want to use. I have changed from ‘Helvetica Neue Ultra Light’ to ‘Garamond’.
You can also change the font colour in the last line of the set. These are actually RGB values with a fourth value set to ‘100’. RGB values are from 0 to 255 in each channel, with 0 being no colour, and 255 being maximum colour for each channel. Thus, a value of ‘255, 255, 255, 100’ would give you white text. Similarly, ‘0, 0, 0, 100’ gives you black text. If you have access to Photoshop or any other decent image editor, you probably already have a good idea how these things go. Again, you can easily change the colours of the fonts in Aperture without editing this file, but if you want to set up a new default, set the line as you need it to be.
In some areas kerning may be set, too. If you don’t know about kerning, leave this set as you find it!
Changing the colour blocks
If changing the fonts is not enough for you, how about finding the colour blocks and changing those? Open the ‘Graphics’ folder and look at the files there. The one I am interested in is ‘BlueRect.plist’. open this in the text editor and you will see a very much more simple set of code. All you need to do is change the value for colour, using the same system as above. For example, if you want a pale lilac block colour, set the values to be ‘235, 222, 241, 100’. Again, if you use Photoshop you can find these values very easily – use the colour picker tool and open up the colour setting dialogue. Move the target around in the colours and watch the RGB values change. When you have the colour you want, note the values and set them in the text file… easy!
Changing the Theme Name
So far we have been tinkering with the fonts and colours. You have already renamed the theme folder copy and when you make your book in aperture you get the new theme in the list of available books, but the name has stayed the same (despite renaming the folder). You can rename the theme so that it appears as you want in Aperture by simply opening the ‘Localizable.strings’ file found in the relevant ‘.lproj’ folder for your language. In my case, I open the ‘English.lproj’ folder where there is just one file. Open it in your text editor and look at the top of the file for the ‘Theme Name’ setting. Change it as you want and you are ready to go. You don’t need to change anything else in this file for the new theme to work.
Updating the Preview Image
Finally, to make your new theme easy to spot and have a nice icon from within Aperture, open up the ‘Preview.tiff’ file in your favourite image editor and make it look like your theme – change the colours, fonts or whatever. Even change the images to help identify it a little more. Save it back to its original location and you are done.
Restart Aperture
In order for your changes to show you need to re-start aperture. When it is running, try adding a new book and look at the list of options you now have. If all has gone according to plan, you should have your new theme showing in the list, ready to use.
If you combine your new theme colours with the existing ability in aperture to create new master pages then you have the opportunity to create some radical new layouts and over time I hope many people do.
Want to share themes?
Now you know how to edit your Aperture themes, why not provide a few for others to use? If ever there was an application crying out for additional content, this would be it, in my opinion! To get a new theme running, simply unzip it, put it in the ‘Book Themes’ folder and start Aperture. To get things going, have a copy of my ‘Alternate Occasions’ theme. It hasn’t changed much, just a font and colour change, but there is plenty more that could be done to make it more attractive. Over time, as new things change, I’ll update the file here.
AlternateThemeLilac
