Images require additional processing time when the form is rendered. If you choose to use images, use compact file formats and the smallest possible image dimensions to minimize the file size. Size the images to the intended dimensions before adding them to the form. Avoid resizing images after adding them to the form.Ensure that corners are square and lines are exactly horizontal and vertical to optimize performance when the form is rendered. Lines that appear to be exactly vertical or horizontal may have a slight slope.You can check the slope of horizontal and vertical lines in the Layout palette. The Height option represents the slope of a horizontal line and the Width option represents the slope of a vertical line. In the following example, a vertical line has a small slope of approximately 0.5 millimeters. A width of 0mm makes the line exactly vertical.