It would be nice it if it were possible to batch resize a whole bunch of pictures. Could be done as follows:
1. Click on "batch resize.."
2. A window opens wherein you can select a number of images
3. Then choose by how much % you want their sizes to be reduced.
OR:
1. Find and select the images in windows explorer
2. Right-click, and select "batch resize.."
3. See 3 above