I have customized my default processing settings for Lightroom in order to apply both Enable Profile Corrections and Remove Chromatic Aberration on import. To do this, I selected a raw image, moved to the Develop module, and clicked the Reset button to remove any previous edits made to the file. Then, I checked both the Enable Profile Corrections and Remove Chromatic Aberration options.
To save the settings, choose Develop > Set Default Settings > Update to Current Settings.
Note: Although the dialog says that the changes are not undoable, it only means that the shortcut Command + Z (Mac) | Control + Z (Win) won’t undo the settings. Don’t worry, you can return to the dialog at any time and choose Restore Adobe Default Settings if needed.
Once the defaults are changed, any images taken with that camera model will automatically have the Enable Profile Corrections and Remove Chromatic Aberration settings applied when the are imported into Lightroom (any images that are already in the catalog remain as they were). Because you are simply enabling Profile Corrections, if you change lenses, Lightroom will automatically look for and apply the appropriate lens correction profile based on the EXIF data in the photo.
If you are using multiple camera models, you will need to customize the default settings for one independently (by taking a raw file from each camera model into the Develop module and changing and saving the settings). You can even save out different setting for each camera based on ISO settings and serial number using Preferences > Presets > Make defaults specific to camera serial number and/or Make defaults specific to camera ISO setting. This can be very useful when using custom camera profiles and/or changing Noise Reduction options for example.
Personally, I like automating the application of Enable Profile Corrections and Remove Chromatic Aberration to my images. However, there are some drawbacks. First, because I have told Lightroom to render Lens Corrections on every image I import, if I import 1,000 images but end up using only 100 of them, adding the Lens Correction to all of the “unused” files may add additional rendering time for previews (how much time depends on your system, file size etc.). If you notice a slowdown in your workflow, you may prefer to create a Lens Correction preset and apply it just to your best images. In addition, if you have lenses that you don’t want corrected. you would have to remove the settings. It’s really up to you and how you prefer to work.
Option (Mac | Alt (Win) changes the Reset button to Set Default and displays the Set Default Settings dialog.
Finally, you should know that when you choose to customize the default settings in either Lightroom or Adobe Camera Raw, those settings are saved for both products.