orientation - Used to rotate the image to portrait if needed.To work around this, I have another preset to rotate and crop the image to portrait. Bug report 11566 seems to cover this problem.

Note that when you rotate an image to get it portrait, Darktable does not properly rotate your crop. If you managed to keep all your scans centred in the same way, then a single crop preset will work nicely for all. crop and rotate - Used to strip off the sprockets from the scanand give a borderless image.It is optional and the purist will not like it. local contrast - I used this to give some images a little more ‘punch’.The colour adjustment that is available will not have any effect here. monochrome - Removes the tint to B&W negatives.Many striking high-contrast images have had a strong tone curve applied. The S-curve makes dark pixels darker and light ones lighter, reducing the dynamic range and increasing contrast giving a ‘punchier’ image. A straight line low to high has no effect. tone curve - Allow you to adjust the brightness of each pixel based on its current brightness.I don’t use any other tting allows a more generic curve to be used, making for a better preset. You can disable this and use the tone cure entirely, but I prefer to use both as the ‘automatic’ levels correction once or twice. I find that a very low black level is good for reducing shadow noise in very dark areas. You will not need to adjust this from its ‘automatic’ setting. This expands the dynamic range to using all brightness levels and increases contrast without making the image look unnatural. levels - This ‘normalised’ the images, effectively making the darkest pixel black, the lightest white and scales everything in between.Summarizing the active modules for my presets: I have provided copies of my Darktable presets that I use on every batch. You will need to spend some time designing presets in Darktable that get you 90% of the way there and then manually adjust per-image until you are happy. Before you ask, I am afraid there is no one size fits all magic button you can press to get everything to always look its best. This is where you will see your negative scans turned into real digital images. To re-add a conection when you return home: sudo mount -a Process the scans To remove a connection when on the move: sudo umount -l /media/yourNasName Once the connection is removed or re-added as appropriate, then restart Darktable and it will work again. To cleanly mount and unmount your network, simply use these commands. If you use this local copy feature and Darktable hangs during startup, it may be because linux is struggling to find your network drives. This feature is invaluable to me and I strongly recommend you use it if you will be working in the same way. I do most of my digital processing during my commute on a train with my laptop. When you are done with editing, simply select the ‘resync local copy’ option for the images. As it says, this creates local copies of the master folders and will keep the masters automatically in sync with all your changes whenever your laptop is reconnected to your home network. It offers the ability to ‘copy images locally’. If you stored your scans on your NAS at home and wish to process them on a laptop away from home then there is a fantastic feature to support this in Darktable. You will notice a little checkbox about ‘ignore JPG files’, which you should check if you want to use your RAW images. This is a simply process of importing a folder. Once you have Darktable up and running, the next thing to do is to import the folders that contain your negatives scans.