The text size of the HTML Help file is affected by the text size that is set in Internet Explorer. As the text size of the Help file is small from the beginning, it becomes difficult to read if the text size in Internet Explorer is set to "smallest".
This symptom has been verified by Microsoft.
If you find it difficult to read the Help file due to the small text size, change the text size in Internet Explorer and open the Help file again.
This symptom is mentioned in the support document "Title: To change colors or fonts in Help and Support " of Windows ME.