How to fix lightroom?

Sometime the Adobe lightroom won't behave as you expect. For example, the brush won't increase the exposure etc.
You can fix it by removing the preference files under:

C:\Users\your-user-name\AppData\Roaming\Adobe\Lightroom\Preferences

How to automatically save the photo edits:
Choose Edit > Catalog Settings (Windows) or Lightroom Classic > Catalog Settings (Mac OS).

Click the Metadata tab, and then do either of the following:


    To write adjustments and settings metadata to XMP, select Automatically Write Changes Into XMP.