Image Height and Width
These two boxes set the height and width that the image will display in each cell. This is not the same as the height and width of the cell. To make the columns all a consistent width, you can check the Evenly spaced cells box.

Also, the images are automatically linked to the image file so that the user can easily click on the image and see the full sized picture.

At the present time, the images that appear in the HTML files are the same "full sized" images that you grabbed when you created the log. In the near future we will be adding the option to automatically create separate thumbnails based on the image size that you specify. This will greatly decrease the download time for you web pages.