Strike the P while any or several images are highlighted in Lightroom to save yourself a lot of time. Striking the P assigns the highlighted image(s) as a Quick Pick. At the bottom of the screen in the Filters bar, click the solid color flag. All the images you’ve flagged will appear in the grid…and all others will be hidden. Just highlight all the images (Cmd/Ctrl + A)
When you get through with any one of these operations, highlight all the files again (Cmd/Ctrl + A) and hit P again. That will turn off the flag for all of the currently selected group so that you can flag another group for another reason.
Here are some of the other reasons you may want to hand-pick groups of files so that you can apply the same thing to all of them (I have made using the following sequence of “picked” files immediately after every Import):
Delete any images you don’t want to keep. If you just delete them one-at-a-time, you have to answer the dialog’s Confirm dialog as to whether you’re sure you want to delete the image from the drive. You then have to wait for the deletion to happen for each image.
Set Rating. All you have to do is strike the number for the number of stars or the color you want to assign and it’s assigned to all the picks for that number or color at once. Furthermore, doing them all at once gives you a last minute chance to make sure this is the collection you want to give this particular rating to.
Assign Keywords and Metadata to groups of files. Doing it to whole groups at a time insures that all the images that deserve this set of keywords or metadata will get the identical keywords or metadata. So your subsequent searches will be much more accurate.
Use the Eyedropper to set the white balance for all the images at the same time. I find that I’m more likely to get the adjustments just right if those adjustment are being made on images that already have the correct white balance. If there’s nothing in one image that has a color that is absolutely neutral, there’s a greater likelihood that there will be at least one in the group.
Process all similarly shot similar files at the same time. Obviously, this cuts your developing time to a fraction of what it would be if you processed each image individually. Just be sure you don’t try to do this on a series of images that have been bracketed for either exposure or white balance.
You’ll probably come up with a few other suggestions of your own. See ya next week.