Because Acidfree is a fairly complex system, dealing with several media types, configuration is not trivial. But, we have tried to include sane default values, so you shouldn't have to worry to much about this section.

Image Resolution

Acidfree allows you to choose the size of images made available to users. There are three sizes: large, the highest resolution image, usually used for printing; medium, the browser viewable image; and thumbnail, the one that you will see when viewing an album. Choose these sizes wisely. Choose sizes that meet your disk space and theme.

It is possible to resize images after they have been imported by changing the image size and then hitting the cron script (http://mysite.dom/cron.php). But beware that it only resized a few at a time, not the entire site. You can select the number of images to resize at one time. Set this at a number that you are comfortable with, being aware that resizing images takes processor power and time. Do not set it to a too-high number that will cause a PHP timeout. See the acidfree/test page to check your max execution time.

It is possible to choose 'Do not keep large image', which means after creating the medium and thumbnail images, it will discard the full sized one. You can do this to save disk space, but if you do, you will not be able to resize the medium image to a larger size at a later time. The medium image is created from the full sized image and the thumbnail is created from the medium image, so you can resize the thumbnail to a larger size even if you are not saving the large images.

This section will also tell you how many of the images have been resized, so you can see how many more you have to go before your entire site is resized.

Acidfree Display

This section is primarily about simple themeing and aesthetics. These settings do not really change much important, so set them however you want. The defaults are sane.

• How do you want to order your pictures? Currently supported is chronologically and reverse chronologically or most recent first.
• Number of rows and number of columns in the album view (this also sets the number of items listed in the album contents view (rows*columns).
• Whether or not to show EXIF data. If the image has EXIF data, it will be shown in a div that can be themed to your liking on the full view of the image.

Image Manipulation

The image toolkit settings found on the site settings page (admin/settings) list the current image toolkit. Drupal ships with a default that uses GD2. The Image module ships with an ImageMagick toolkit (image.imagemagick.inc). Acidfree ships with another toolkit, Imagick (image.imagick.inc), a php4-imagick library that uses the ImageMagick libraries, but does not require forking and execing a new process. Choose whatever toolkit you want. All the toolkits work fine as far as Acidfree is concerned. It has been said that GD2 is slower than the others, but it is up to you.

Acidfree will work fine with only the image toolkit. But for those image snobs like the Author, lossless jpeg rotation is also supported using exiftran or jpegtran. If you want to have lossless jpeg rotation, install one of those programs and set the path in this section. Acidfree automatically tries to use lossless rotation and if that can't be done, it uses the image toolkit for rotation. While it is lossy, for most images it won't matter and you won't really be able to tell. But repeated rotations could result in poorer image quality.

Video Manipulation

Acidfree offers three settings for video manipulation. No thumbnails, user-supplied thumbnails, or mplayer-generated thumbnails. Be aware that currently, unless you are using the mplayer method, mass uploads of videos will not work because there is no way to determine the video resolution.

No thumbnails is the easy way out. All you have to do is set the height and width of the video when uploading it and a static thumbnail will be used for all the videos.

User-supplied thumbnails will probably get you the best looking thumbnails for your videos. For this option, you must supply a full-sized frame (the same resolution as the video) that you want to be the thumbnail. Acidfree will resize it to the correct size for the thumbnail.

Mplayer can automatically create thumbnails of most video types. This method currently will just grab the first frame of the video and create a thumbnail out of that. To use this method, you must have mplayer installed, select this option, and set the path to the executable.

Filemanager Settings

Acidfree supports public and private content via node_access modules such as Organic Groups or Node Privacy by Role. When a node is marked as not viewable by the Anonymous user, the files will be stored in the Filemanager private filestore. Here you can choose to store all of your images in the private filestore or update all your media files to reflect their respective nodes' public or private state.

Note that forcing all files to be stored in the private filestore will cause a performance hit, as streaming the files with Drupal is not as efficient as letting Apache handle it.

Unless you are upgrading from an older version of Acidfree, the 'Process all images against new security' option should not be necessary. But if you do select this, it is done via the cron hook, so you must hit cron.php enough times to process all your images.

Other settings

Access controls

Make sure you set up the appropriate permissions on the access control page (admin/access). You can choose to allow 'acidfree mass import', 'create acidfree albums', 'create acidfree photos', 'create acidfree videos', and 'edit own acidfree elements' for each user group.

Input filters

If you wish to have embedded Acidfree images in your other node bodies, enable the Acidfree input filters. Go to admin/filters and select 'configure' for each input type you want to enable it for. Then, check 'Acidfree inline filter' and hit save. This allows for tags like [acidfree:nnn] to be put in the body field of other node types.

Default publish/comment options

By default, Acidfree does not promote new items to the front page. If you wish to change this or change the other 'workflow' settings go to admin/node/configure/types/acidfree and change the defaults.