Rows are the पुरुष, columns the वचन. Pāṇini counts persons the other way round from English: प्रथमपुरुषः is the third person (“he, they”), मध्यमपुरुषः the second (“you”), उत्तमपुरुषः the first (“I, we”). A भावे table has a single cell — the impersonal verb is always third person singular.
How to read these tables
before you look anything upप्रथमा to सप्तमी, then सम्बोधनम् — the vocative, which is not a case of its own but the प्रथमा used to call someone (2.3.47). The pronouns अस्मद् and युष्मद् have no gender and no vocative, so those cells are empty.
Each card names the affix, says what the form means, gives the stem and its nominative in each gender it takes. Open a card for the full declension. Indeclinables — क्त्वा, ल्यप्, तुमुन्, णमुल् — have one form and no table.