This release of Lightroom Classic CC add a few new features and enhancements, support for new cameras and lenses, and bug fixes. Full details of what’s new and fixed in Lightroom 7.4 can be found on the application support page.
Before discussing new features there are a couple of tweaks to the Presets and Profiles functionality introduced in version 7.3. The first and probably most annoying for customers editing large images such as HDR are Panorama is the delay in loupe view screen redraw when the mouse is hovered over a preset. To address this, Adobe has added a new preference in the performance panel (see below screenshot). There is no similar preference for the Profile Browser but you can press down the Option/Alt modifier key to temporarily turn off the profile preview in the loupe.

Enable Hover Preset Preview in Loupe View
Manage Presets and Profiles
With version 7.3 Adobe introduced a new method of previewing and applying Develop Presets and Camera Profiles. Unfortunately, the ability to manage the presets and profiles was absent. It was a strange omission, especially since customers have, since the very earliest versions of Lightroom, asked for a way to hide presets they don’t use. With version 7.4 Adobe have addressed this omission, which will no doubt please many customers. However, you can only disable/hide groups, not individual presets or profiles.
To show/hide preset groups:
Click on the [+] button at upper right corner of the Presets panel to bring up the context-menu then choose Manage Preset groups to activate the Preset Manager. Also, notice that the presets that shipped with Lightroom for years are now prefixed ‘Classic’. If Adobe wanted to confuse customers this is the perfect way to do it.

Preset Manager
To show/hide profile groups:
- In the Profile Browser, right-click (Win) / Ctrl-click (Mac) any profile group and choose Manage Profiles from the menu.
- In the Manage Profiles dialog, select the profile groups that you want to show in Profile Browser. Deselect the profile groups that you want to hide from Profile Browser.

Profile Manager
Colour Labels for Folders
The addition of colour labels, like show/hide presets is, in my opinion, long overdue. Customers have been asking for folder labels since back in the days of the Lightroom 1.0 public beta (i.e. 2006).
In the Folders panel (Library module), you can now organise assign colour labels to folders.
- In the Folders panel, select one or more folders and right-click (Win) / Control-click (Mac) to bring up the context-menu.
- From the context-menu, choose Add Color Labeland then select any color from the submenu.
You can also filter all the folders that have been assigned a colour label. If you prefer to structure your catalog based on folder dates rather than names, then I think you’ll be very pleased.

Colour Labels on Folder
The folder search feature has also received some attention in the form of a performance boost. A new database file ‘Helper.lrdata‘ is used to assist Folder Search is stored alongside the catalog (.lrcat) and previews (previews.lrdata).
HEIC image files support on macOS High Sierra
Lightroom Classic CC now supports Apple’s HEIC image file format.
Auto stack HDR and panorama
You can now configure the HDR/Panorama dialog to automatically create stacks for HDR and Panorama images. For example, in the HDR Merge Preview dialog, select the Create Stack option to group the exposure-bracketed images and the HDR image in to a stack. The merged HDR image will be displayed at the top of the stack.

Auto-stack in HDR dialog
New Camera Support
New support added since the last release appears in green.
- Fujifilm X-T100
- Pentax K-1 Mark II*
- Phase One IQ3 100MP Trichromatic**
- Samsung Galaxy S9
- Samsung Galaxy S9+
*Dynamic Pixel Shift Resolution is not currently supported. Opening images captured in this mode will display only the first raw image frame.**Denotes preliminary support.
A full list of cameras supported by Lightroom can be found at Cameras supported by Camera Raw.