Regarding what's displayed in right-hand library panel under 'Metadata'.
In Plugin Manager, ExifMeta Metadata Selection determines what's displayed in the ExifMeta section, but you can also use tagsets to customize the other info that will be displayed along with it. ExifMeta provides two built-in tagsets which you can modify: (advanced users can create additional tagsets).
'RC Standard' - has lots of stuff.
'RC Custom' - bare bones.
Customizing tagsets - possibilities:
1. Delete stuff from RC Standard that you don't want.
2. Add stuff to RC Custom that you do want.
3. Add another custom tagset...
Instructions for possibility #1 (recommended for novices):
I regret that the tagset editing is not more straight-forward, but here's what you have to do:
1. Go to Plugin Manager for ExifMeta - Preset Manager section.
2. Enter a name for a preset, since you can no longer edit advanced settings of the default preset.
(if you are on a Mac, then hit the tab key). NOTE: the advanced settings file may get lost when you next update ExifMeta *unless* you use the 'Update Plugin' button in Plugin Manager.
3. If its a new preset, click 'OK' when asked. If the preset already exists, then click 'Edit Advanced Settings'.
(that should open a corresponding lua configuration file in your default text editor).
4. Delete the lines corresponding to the stuff you don't want, or better yet:
COMMENT THEM OUT BY INSERTING '--' at the beginning of the line, without the apostrophes.
5. Click 'Commit' in the 'ExifMeta Metadata Selection' section below.
6. Click 'OK' when prompted, then click 'Reload Plugin' in the Plugin Author Tools section.
(if no syntax errors, changes should be in effect - otherwise you'll get an error message and have to fix syntax errors...)
Instructions for possibility #2 (slightly more advanced):
Same as #1, except you'll be copying and pasting items from RC Standard (assuming they haven't been deleted).
You may need to uncomment them by deleting the two '--' characters at the beginning of the line.
Instructions for possibility #3 (advanced users only):
Same as #2 except you have to copy then edit one of the other tagset baselines too, and add it to the local lua array near the bottom of the file.
PS - I'm working with Adobe (pleading really) for native support of tagset editing in Lightroom - please add your vote:
http://feedback.photoshop.com/photoshop_family/topics/metadata_viewing_presets_tagsets_make_user_definableRob