To provide an alternative to the first problem and to help with the second problem, you use the alt attribute. The alt attribute displays an alternative text. Save the file and preview it in the browser. Position the mouse on the picture and notice that a few words come up. Bring back Notepad.
Some graphics are very large and they take time to display.
In this case, somehow you would need to know the dimensions of the image. Save the file and preview it in the browser. By default, the picture aligns with the lower border of the picture. The align attribute could be set as top, texttop, left, right, bottom, absbottom, middle, absmiddle, or baseline.