When working with multiple images in Eagle, you can efficiently add tags to multiple files at once using several methods.

Method 1: Using the Tag Window

Select multiple images: Choose the images you want to tag in Eagle.
Open the floating tag panel: With the images selected, press the T key on your keyboard to open the floating tag panel.
Add tags: In the tag panel, you can search for existing tags or create new ones. You can also use the "Recommended" and "Recently Used" features to quickly add tags.

Method 2: Copy and Paste Tags

Select an image with organized tags: Choose one image that already has the tags you want to apply to other images.
Copy the tags: Right-click on the "Tags" section in the right inspector panel and select "Copy Tags," or use the keyboard shortcut Shift + ⌘ + C.
Paste the tags: Select the other images that need the same tags, right-click on the "Tags" section in the inspector panel and select "Paste Tags," or use the keyboard shortcut Shift + ⌘ + V.

Create a new folder in the left sidebar or right-click on an existing folder, then select "Set Auto Tags" or use the keyboard shortcut ⌘ + Shift + R.
Click on the "Auto Add Tags" field, check or create tags, and save the settings.
All existing files in the folder and any new files added later will automatically receive the configured tags.