A: The "Relative adjustments" plug-ins uses the Lightroom preset mechanism.
As a consequence all values needs to be written as values.
The default rule is that a preset of a develop setting should be created with the slider itself.
For all develop settings that have a range from -100 to +100 or more you set the value you want.
For example: to create a preset with Shadows 50% you set the value to 50.
However, some develop settings have a smaller range, like Exposure: -5 to +5.
For these settings you use the decimal value.
To create preset for 50% Exposure, you set the value of the Exposure to 0.50.
Note: until the introduction of the XML layout of the presets in Lightroom 7.4, the Exposure preset should be written as 10.
Now it is 0.10
When you use the "Relative adjustments" - percent option you might run into the situation that you want to specify a percentage that is greater than the range of the slider in Lightroom.
For example the Exposure slider has a range from -5 to +5.
Now if you want to add 10%, then you need to change the Exposure/Exposure2012 value to 0.10. In Lightroom you will not get this done.
A: You can manually change the value of an develop tool setting in a preset.
This is quit simple. The steps below describe this process with the Exposure slider to be set at 0.10 as an example.
Right click on the preset and select “Show in Explorer” for Windows or “Show in Finder” for the Mac.
If TextEdit is on your Dock, then drag the preset file to TextEdit.
If not, right click on the preset file. In the context menu choose “Open With”, then “Other”. Choose TextEdit.
You can open Notepad by going to start, Accessories and then NotePad.
Windows 8 or 10,
use the search option and type “Notepad”.
Now drag the preset file on the NotePad window. It should open.
Once the preset file is in your text editor, change the value behind Exposure 2012 and change it to 0.10.
Leave the comma behind the value.
The rest of the file you must leave intact and not change.
Now save the preset file and close the text editor.
A: All Lightroom plug-ins, like this one, use the Lightroom SDK (Software Developing Kit). This is a library of functions a develop can use.
This SDK contains the function to retrieve the Develop settings of a photo.
In some cases this functions returns -999999 instead of the actual value. This happens for example when you apply Auto-tone and run this plug-in before all changed images have their thumbnails updated.
This option checks whether the photo you selected return -999999 and if so activate the thumbnail generation.
This explains also why this step might takes some time.
You might run into a message like this one. On Windows and Mac OS-X it might look a little different, but the message is the same: a script, in this case JQuery, takes longer than normal and that's why this message pops up.
As said, the advantage is a better looking report, however with big reports, the processing time needed for JQuery may take a while.
Your browser may indicate that the JQuery script is "Unresponsive". This is not the case, but it needs more time to render the report.
You get the options to to "Stop script" and "Continue". You can freely choose either option: stop or continue. Nothing goes wrong and certainly not with your photos, because this concerns your browser and not Lightroom.
Solution: when you apply a preset relative or with percentage, the plugin will subtract 25000 of the specified value. When applied absolute, like Lightroom, the value specified is used.
So if you want to add 100 to the Temperature you need create a preset with 25100: 25100 - 25000 = 100.
24900 will result in a subtraction of 100 of the temperature.
A: Explanation: when creating a preset from the White balance settings, you can only choose to select all White balance settings and not Tint or Temperature separate. It is all or nothing.
The only way to use only Temperature of Tint is to set the other to their default, Temperature to 25000 or Tint to 0 (zero).
We set 25000 to the zero point for Temperature. When applying the preset relative or with percentage 25000 will be subtracted of the specified value.