Export tool and Watermarks
Export tool
Use the Export tool in Picasa to resize your photos or to otherwise create copies of your photos with all edits applied. When you export pictures in Picasa, you're creating a new copy of that picture with control over both the image resolution (the height and width of the image measured in pixels) and the image quality (JPEG compression). The original photo on your hard drive is never altered. Follow these steps to export copies of your photos:
Select the photos you'd like to export.
Click the Export button in the Photo Tray.
In the 'Export to Folder' window, select your export settings:
Choose an export location and enter a name for the exported folder.
Customize your exported image size and quality:
Image size options: You can choose between using the photo's original size or selecting a custom pixel size using the slider. The number of pixels you select with this slider determines the length or height of your photo (whichever is longer). The other dimension is determined automatically to maintain the aspect ratio of the photo.
Image quality: Select the desired image quality for your photo using the Image Quality drop-down menu
Automatic: Preserves the original image quality
Normal: Balances quality and size
Maximum: Preserves fine detail for large file sizes
Minimum: Yields some quality loss for small file sizes
Custom: Enables you to select your own value
You can choose to add a watermark (see below) to all of your exported photos.
Click OK.
Your exported images are now saved on your hard drive in the location you specified. In Picasa, you can find these photos in the 'Exported Pictures' collection.
Adding watermarks to photos
You can help protect your images by adding a watermark to your photos. A watermark in Picasa is white text that's added to the lower-right corner of photos during the export or upload process. To add a watermark to a photo, please use the following steps:
During export
Select the photos you'd like to export.
Click the Export button in the Photo Tray.
Select the 'Add a watermark' checkbox.
In the watermark box, enter your watermark text.
Click OK. Your photos will be exported with your watermark in place.
Picasa will never make changes to your original photo file. Exporting and uploading pictures with edits or watermarks applied creates an edited JPG copy of the original photo.