Meditation Techniques

तत्वानुशाशन ग्रन्थ में ध्यान करने की कुछ विधि बताई है, the words are quite difficult here. If someone could explain the highlighted text, it would be very helpful.

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Does it means to imagine “Arihant” name with a glow like below?
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what are 7 मुख रंध्रों ?

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Link to shastra: https://www.atmadharma.com/shastras/tattvaanushashan_hin_txt_VV.pdf

Any help on this?
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